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Martynov AG, Horii Y, Katoh K, Bian Y, Jiang J, Yamashita M, Gorbunova YG. Rare-earth based tetrapyrrolic sandwiches: chemistry, materials and applications. Chem Soc Rev 2022; 51:9262-9339. [DOI: 10.1039/d2cs00559j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This review summarises advances in chemistry of tetrapyrrole sandwiches with rare earth elements and highlights the current state of their use in single-molecule magnetism, organic field-effect transistors, conducting materials and nonlinear optics.
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Affiliation(s)
- Alexander G. Martynov
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071, Leninskiy pr., 31, bldg.4, Moscow, Russia
| | - Yoji Horii
- Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan
| | - Keiichi Katoh
- Department of Chemistry, Graduate School of Science, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan
| | - Yongzhong Bian
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, China
- Daxing Research Institute, and Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, China
| | - Jianzhuang Jiang
- Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials, Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, China
- Daxing Research Institute, and Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing, China
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan
| | - Yulia G. Gorbunova
- A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071, Leninskiy pr., 31, bldg.4, Moscow, Russia
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Leninskiy pr., 31, Moscow, Russia
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2
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Uğurlu M, Akkuş T, Demir L. Determination of L X-ray fluorescence cross-sections in the atomic range of elements 57 ≤ Z ≤ 69 in an external magnetic field. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Abstract
Spin-crossover (SCO) active transition metal complexes are an important class of switchable molecular materials due to their bistable spin-state switching characteristics at or around room temperature. Vacuum-sublimable SCO complexes are a subclass of SCO complexes suitable for fabricating ultraclean spin-switchable films desirable for applications, especially in molecular electronics/spintronics. Consequently, on-surface SCO of thin-films of sublimable SCO complexes have been studied employing spectroscopy and microscopy techniques, and results of fundamental and technological importance have been obtained. This Review provides complete coverage of advances made in the field of vacuum-sublimable SCO complexes: progress made in the design and synthesis of sublimable functional SCO complexes, on-surface SCO of molecular and multilayer thick films, and various molecular and thin-film device architectures based on the sublimable SCO complexes.
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Affiliation(s)
- Kuppusamy Senthil Kumar
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)CNRS-Université de Strasbourg23, rue du Loess, BP 4367034Strasbourg cedex 2France
| | - Mario Ruben
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)CNRS-Université de Strasbourg23, rue du Loess, BP 4367034Strasbourg cedex 2France
- Institute of NanotechnologyKarlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
- Institute of Quantum Materials and -TechnologyKarlsruhe Institute of Technology (KIT)Hermann-von-Helmholtz-Platz 176344Eggenstein-LeopoldshafenGermany
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4
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Affiliation(s)
- Kuppusamy Senthil Kumar
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) CNRS-Université de Strasbourg 23, rue du Loess, BP 43 67034 Strasbourg cedex 2 Frankreich
| | - Mario Ruben
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS) CNRS-Université de Strasbourg 23, rue du Loess, BP 43 67034 Strasbourg cedex 2 Frankreich
- Institut für Nanotechnologie Karlsruher Institut für Technologie (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Deutschland
- Institut für Quantenmaterialien und -technologien Karlsruher Institut für Technologie (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Deutschland
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Abstract
Nuclear spin levels play an important role in understanding magnetization dynamics and implementation and control of quantum bits in lanthanide-based single-molecule magnets. We investigate the hyperfine and nuclear quadrupole interactions for 161Dy and 163Dy nuclei in anionic DyPc2 (Pc = phthalocyanine) single-molecule magnets, using multiconfigurational ab initio methods (beyond density-functional theory) including spin-orbit interaction. The two isotopes of Dy are chosen because the others have zero nuclear spin. Both isotopes have the nuclear spin I = 5/2, although the magnitude and sign of the nuclear magnetic moment differ from each other. The large energy gap between the electronic ground and first-excited Kramers doublets, allows us to map the microscopic hyperfine and quadrupole interaction Hamiltonian onto an effective Hamiltonian with an electronic pseudo-spin [Formula: see text] that corresponds to the ground Kramers doublet. Our ab initio calculations show that the coupling between the nuclear spin and electronic orbital angular momentum contributes the most to the hyperfine interaction and that both the hyperfine and nuclear quadrupole interactions for 161Dy and 163Dy nuclei are much smaller than those for the 159Tb nucleus in TbPc2 single-molecule magnets. The calculated separations of the electronic-nuclear levels are comparable to experimental data reported for 163DyPc2. We demonstrate that hyperfine interaction for the Dy Kramers ion leads to tunnel splitting (or quantum tunneling of magnetization) at zero field. This effect does not occur for TbPc2 single-molecule magnets. The magnetic field values of the avoided level crossings for 161DyPc2 and 163DyPc2 are found to be noticeably different, which can be observed from the experiment.
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Affiliation(s)
- Aleksander L Wysocki
- Department of Physics, Virginia Tech, Blacksburg, VA 24061, United States of America
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6
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Abstract
Lanthanide-based single-ion magnetic molecules can have large magnetic hyperfine interactions as well as large magnetic anisotropy. Recent experimental studies reported tunability of these properties by changes of chemical environments or by application of external stimuli for device applications. In order to provide insight onto the origin and mechanism of such tunability, here we investigate the magnetic hyperfine and nuclear quadrupole interactions for a 159Tb nucleus in TbPc2 (Pc = phthalocyanine) single-molecule magnets using multiconfigurational ab initio methods including spin-orbit interaction. Since the electronic ground and first-excited (quasi)doublets are well separated in energy, the microscopic Hamiltonian can be mapped onto an effective Hamiltonian with an electronic pseudospin S = 1/2. From the ab initio calculated parameters, we find that the magnetic hyperfine coupling is dominated by the interaction of the Tb nuclear spin with electronic orbital angular momentum. The asymmetric 4f-like electronic charge distribution leads to a strong nuclear quadrupole interaction with significant transverse terms for the molecule with low symmetry. The ab initio calculated electronic-nuclear spectrum including the magnetic hyperfine and quadrupole interactions is in excellent agreement with the experiment. We further find that the transverse quadrupole interactions significantly influence the avoided level crossings in magnetization dynamics and that the molecular distortions affect mostly the Fermi contact terms as well as the transverse quadrupole interactions.
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Affiliation(s)
| | - Kyungwha Park
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, United States
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7
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Studniarek M, Wäckerlin C, Singha A, Baltic R, Diller K, Donati F, Rusponi S, Brune H, Lan Y, Klyatskaya S, Ruben M, Seitsonen AP, Dreiser J. Understanding the Superior Stability of Single-Molecule Magnets on an Oxide Film. Adv Sci (Weinh) 2019; 6:1901736. [PMID: 31763154 PMCID: PMC6864999 DOI: 10.1002/advs.201901736] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 09/05/2019] [Indexed: 05/12/2023]
Abstract
The stability of magnetic information stored in surface adsorbed single-molecule magnets is of critical interest for applications in nanoscale data storage or quantum computing. The present study combines X-ray magnetic circular dichroism, density functional theory and magnetization dynamics calculations to gain deep insight into the substrate dependent relevant magnetization relaxation mechanisms. X-ray magnetic circular dichroism reveals the opening of a butterfly-shaped magnetic hysteresis of DyPc2 molecules on magnesium oxide and a closed loop on the bare silver substrate, while density functional theory shows that the molecules are only weakly adsorbed in both cases of magnesium oxide and silver. The enhanced magnetic stability of DyPc2 on the oxide film, in conjunction with previous experiments on the TbPc2 analogue, points to a general validity of the magnesium oxide induced stabilization effect. Magnetization dynamics calculations reveal that the enhanced magnetic stability of DyPc2 and TbPc2 on the oxide film is due to the suppression of two-phonon Raman relaxation processes. The results suggest that substrates with low phonon density of states are beneficial for the design of spintronics devices based on single-molecule magnets.
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Affiliation(s)
- Michał Studniarek
- Swiss Light SourcePaul Scherrer Institut (PSI)CH‐5232VilligenSwitzerland
| | - Christian Wäckerlin
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
- Institute of PhysicsThe Czech Academy of SciencesCukrovarnická 10CZ‐162 00Prague 6Czech Republic
| | - Aparajita Singha
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
- Center for Quantum NanoscienceInstitute for Basic Science (IBS)03760SeoulRepublic of Korea
- Department of PhysicsEwha Womans University03760SeoulRepublic of Korea
| | - Romana Baltic
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
| | - Katharina Diller
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
| | - Fabio Donati
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
- Center for Quantum NanoscienceInstitute for Basic Science (IBS)03760SeoulRepublic of Korea
- Department of PhysicsEwha Womans University03760SeoulRepublic of Korea
| | - Stefano Rusponi
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
| | - Harald Brune
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
| | - Yanhua Lan
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)Hermann‐von‐Helmholtz‐Platz 1D‐76344Eggenstein‐LeopoldshafenGermany
| | - Svetlana Klyatskaya
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)Hermann‐von‐Helmholtz‐Platz 1D‐76344Eggenstein‐LeopoldshafenGermany
| | - Mario Ruben
- Institute of Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)Hermann‐von‐Helmholtz‐Platz 1D‐76344Eggenstein‐LeopoldshafenGermany
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)Centre National de la Recherche Scientifique (CNRS)Université de Strasbourg23 rue du Loess, BP 43F‐67034Strasbourg Cedex 2France
| | - Ari Paavo Seitsonen
- Département de ChimieÉcole Normale SupérieureF‐75005ParisFrance
- Centre National de la Recherche Scientifique (CNRS)Paris Sciences et LettresSorbonne UniversitéF‐75005ParisFrance
| | - Jan Dreiser
- Swiss Light SourcePaul Scherrer Institut (PSI)CH‐5232VilligenSwitzerland
- Institute of Physics (IPHYS)École Polytechnique Fédérale de Lausanne (EPFL)Station 3CH‐1015LausanneSwitzerland
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8
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Gransbury GK, Boulon ME, Mole RA, Gable RW, Moubaraki B, Murray KS, Sorace L, Soncini A, Boskovic C. Single-ion anisotropy and exchange coupling in cobalt(ii)-radical complexes: insights from magnetic and ab initio studies. Chem Sci 2019; 10:8855-8871. [PMID: 31803460 PMCID: PMC6853083 DOI: 10.1039/c9sc00914k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 07/27/2019] [Indexed: 01/18/2023] Open
Abstract
The concurrent effects of single-ion anisotropy and exchange interactions on the electronic structure and magnetization dynamics have been analyzed for a cobalt(ii)-semiquinonate complex. Analogs containing diamagnetic catecholate and tropolonate ligands were employed for comparison of the magnetic behavior and zinc congeners assisted with the spectroscopic characterization and assessment of intermolecular interactions in the cobalt(ii) compounds. Low temperature X-band (ν ≈ 9.4 GHz) and W-Band (ν ≈ 94 GHz) electron paramagnetic resonance spectroscopy and static and dynamic magnetic measurements have been used to elucidate the electronic structure of the high spin cobalt(ii) ion in [Co(Me3tpa)(Br4cat)] (1; Me3tpa = tris[(6-methyl-2-pyridyl)methyl]amine, Br4cat2- = tetrabromocatecholate) and [Co(Me3tpa)(trop)](PF6) (2(PF6); trop- = tropolonate), which show slow relaxation of the magnetization in applied field. The cobalt(ii)-semiquinonate exchange interaction in [Co(Me3tpa)(dbsq)](PF6)·tol (3(PF6)·tol; dbsq- = 3,5-di-tert-butylsemiquinonate, tol = toluene) has been determined using an anisotropic exchange Hamiltonian in conjunction with multistate restricted active space self-consistent field ab initio modeling and wavefunction analysis, with comparison to magnetic and inelastic neutron scattering data. Our results demonstrate dominant ferromagnetic exchange for 3+ that is of similar magnitude to the anisotropy parameters of the cobalt(ii) ion and contains a significant contribution from spin-orbit coupling. The nature of the exchange coupling between octahedral high spin cobalt(ii) and semiquinonate ligands is a longstanding question; answering this question for the specific case of 3+ has confirmed the considerable sensitivity of the exchange to the molecular structure. The methodology employed will be generally applicable for elucidating exchange coupling between orbitally-degenerate metal ions and radical ligands and relevant to the development of bistable molecules and their integration into devices.
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Affiliation(s)
- Gemma K Gransbury
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Marie-Emmanuelle Boulon
- UdR INSTM , Department of Chemistry "U. Schiff" , University of Florence , 50019 Sesto Fiorentino (FI) , Italy
| | - Richard A Mole
- Australian Nuclear Science and Technology Organisation , Locked Bag 2001 , Kirrawee DC , New South Wales 2232 , Australia
| | - Robert W Gable
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Boujemaa Moubaraki
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Keith S Murray
- School of Chemistry , Monash University , Clayton , Victoria 3800 , Australia
| | - Lorenzo Sorace
- UdR INSTM , Department of Chemistry "U. Schiff" , University of Florence , 50019 Sesto Fiorentino (FI) , Italy
| | - Alessandro Soncini
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
| | - Colette Boskovic
- School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia .
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Moreno Pineda E, Komeda T, Katoh K, Yamashita M, Ruben M. Surface confinement of TbPc 2-SMMs: structural, electronic and magnetic properties. Dalton Trans 2018; 45:18417-18433. [PMID: 27824366 DOI: 10.1039/c6dt03298b] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Since 2003, terbium(iii) bis-phthalocyaninato complexes have been recognised as acting as single molecule magnets (SMMs), propitiating multiple studies with the aim of better understanding the single metal-ion based magnetism with unusually high blocking temperatures. In the quest for novel applications, it became clear that if spintronic devices were made from SMM molecules, their confinement in the proximity of surfaces or electrodes would become difficult to circumvent. In this perspective article, we highlight the influence of the presence of different substrates on the magnetic performance of TbPc2-SMMs, in principle caused by, among other effects, electronic hybridization, dipole-dipole coupling and changing quantum tunnelling (QT) rates on the surface. We show that the improved comprehension of how SMMs interact and communicate with the environment finally leads to magnetic remanence and lower tunnelling rates, paving the way to novel classes of spintronic devices.
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Affiliation(s)
- Eufemio Moreno Pineda
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany.
| | - Tadahiro Komeda
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM, Tagen), Tohoku University, Japan
| | - Keiichi Katoh
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan.
| | - Masahiro Yamashita
- Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki-Aza-Aoba, Aoba-Ku, Sendai 980-8578, Japan. and WPI Research Center, Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Mario Ruben
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany. and WPI Research Center, Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan and Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS-Université de Strasbourg, 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex 2, France
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10
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Corradini V, Candini A, Klar D, Biagi R, De Renzi V, Lodi Rizzini A, Cavani N, Del Pennino U, Klyatskaya S, Ruben M, Velez-Fort E, Kummer K, Brookes NB, Gargiani P, Wende H, Affronte M. Probing magnetic coupling between LnPc 2 (Ln = Tb, Er) molecules and the graphene/Ni (111) substrate with and without Au-intercalation: role of the dipolar field. Nanoscale 2017; 10:277-283. [PMID: 29210429 DOI: 10.1039/c7nr06610d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Lanthanides (Ln) bis-phthalocyanine (Pc), the so-called LnPc2double decker, are a promising class of molecules with a well-defined magnetic anisotropy. In this work, we investigate the magnetic properties of LnPc2 molecules UHV-deposited on a graphene/Ni(111) substrate and how they modify when an Au layer is intercalated between Ni and graphene. X-ray absorption spectroscopy (XAS), and linear and magnetic circular dichroism (XLD and XMCD) were used to characterize the systems and probe the magnetic coupling between LnPc2 molecules and the Ni substrate through graphene, both gold-intercalated and not. Two types of LnPc2 molecules (Ln = Tb, Er) with a different magnetic anisotropy (easy-axis for Tb, easy-plane for Er) were considered. XMCD shows an antiferromagnetic coupling between Ln and Ni(111) even in the presence of the graphene interlayer. Au intercalation causes the vanishing of the interaction between Tb and Ni(111). In contrast, in the case of ErPc2, we found that the gold intercalation does not perturb the magnetic coupling. These results, combined with the magnetic anisotropy of the systems, suggest the possible importance of the magnetic dipolar field contribution for determining the magnetic behaviour.
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Affiliation(s)
- V Corradini
- Centro S3, Istituto Nanoscienze - CNR, via G. Campi 213/A, 41125 Modena, Italy.
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11
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Calborean A, Graur F, Bintintan V. The influence of correlation effects on the electronic structure of double-decker bis(phthalocyaninato)-Dy, Tb complexes. COMPUT THEOR CHEM 2017; 1112:104-110. [DOI: 10.1016/j.comptc.2017.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Rigamonti L, Piccioli M, Nava A, Malavolti L, Cortigiani B, Sessoli R, Cornia A. Structure, magnetic properties and thermal sublimation of fluorinated Fe 4 Single-Molecule Magnets. Polyhedron 2017; 128:9-17. [DOI: 10.1016/j.poly.2017.02.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Abstract
Gaining control on the size or the direction of the magnetic moment of adsorbed metal-organic molecules constitutes an important step towards the realization of a surface-mounted molecular spin electronics. Such control can be gained by taking advantage of interactions of the molecule's magnetic moment with the environment. The paramagnetic moments of adsorbed metal-organic molecules, for example, can be controlled by the interaction with magnetically ordered substrates. Metalloporphyrins and -phthalocyanines display a quasi-planar geometry, allowing the central metal ion to interact with substrate electronic states. This can lead to magnetic coupling with a ferromagnetic or even antiferromagnetic substrate. The molecule-substrate coupling can be mediated and controlled by insertion layers such as oxygen atoms, graphene, or nonmagnetic metal layers. Control on the magnetic properties of adsorbed metalloporphyrins or -phthalocyanines can also be gained by on-surface chemical modification of the molecules. The magnetic moment or the magnetic coupling to ferromagnetic substrates can be changed by adsorption and thermal desorption of small molecules that interact with the fourfold-coordinated metal center via the remaining axial coordination site. Spin-crossover molecules, which possess a metastable spin state that can be switched by external stimuli such as temperature or light, are another promising class of candidates for control of magnetic properties. However, the immobilization of such molecules on a solid surface often results in a quench of the spin transition due to the interaction with the substrate. We present examples of Fe(II) spin-crossover complexes in direct contact with a solid surface that undergo a reversible spin-crossover transition as a function of temperature, by illumination with visible light, or can be switched by the tip of a scanning tunneling microscope.
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Affiliation(s)
- Wolfgang Kuch
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
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14
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Bartolomé E, Arauzo A, Luzón J, Bartolomé J, Bartolomé F. Magnetic Relaxation of Lanthanide-Based Molecular Magnets. Handbook of Magnetic Materials 2017. [DOI: 10.1016/bs.hmm.2017.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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15
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Ge JY, Cui L, Li J, Yu F, Song Y, Zhang YQ, Zuo JL, Kurmoo M. Modulating Single-Molecule Magnetic Behavior of a Dinuclear Erbium(III) Complex by Solvent Exchange. Inorg Chem 2016; 56:336-343. [DOI: 10.1021/acs.inorgchem.6b02243] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jing-Yuan Ge
- State Key Laboratory
of Coordination Chemistry, School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Long Cui
- State Key Laboratory
of Coordination Chemistry, School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Jing Li
- State Key Laboratory
of Coordination Chemistry, School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Fei Yu
- State Key Laboratory
of Coordination Chemistry, School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - You Song
- State Key Laboratory
of Coordination Chemistry, School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS, School
of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, People’s Republic of China
| | - Jing-Lin Zuo
- State Key Laboratory
of Coordination Chemistry, School of Chemistry and Chemical Engineering,
Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210023, People’s Republic of China
| | - Mohamedally Kurmoo
- Institut de Chimie de Strasbourg, Université de Strasbourg, CNRS-UMR 7177, 4 Rue Blaise Pascal, 67008 Cedex Strasbourg, France
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16
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Marocchi S, Candini A, Klar D, Van den Heuvel W, Huang H, Troiani F, Corradini V, Biagi R, De Renzi V, Klyatskaya S, Kummer K, Brookes NB, Ruben M, Wende H, Del Pennino U, Soncini A, Affronte M, Bellini V. Relay-Like Exchange Mechanism through a Spin Radical between TbPc 2 Molecules and Graphene/Ni(111) Substrates. ACS Nano 2016; 10:9353-9360. [PMID: 27726335 DOI: 10.1021/acsnano.6b04107] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We investigate the electronic and magnetic properties of TbPc2 single ion magnets adsorbed on a graphene/Ni(111) substrate, by density functional theory (DFT), ab initio complete active space self-consistent field calculations, and X-ray magnetic circular dichroism (XMCD) experiments. Despite the presence of the graphene decoupling layer, a sizable antiferromagnetic coupling between Tb and Ni is observed in the XMCD experiments. The molecule-surface interaction is rationalized by the DFT analysis and is found to follow a relay-like communication pathway, where the radical spin on the organic Pc ligands mediates the interaction between Tb ion and Ni substrate spins. A model Hamiltonian which explicitly takes into account the presence of the spin radical is then developed, and the different magnetic interactions at play are assessed by first-principle calculations and by comparing the calculated magnetization curves with XMCD data. The relay-like mechanism is at the heart of the process through which the spin information contained in the Tb ion is sensed and exploited in carbon-based molecular spintronics devices.
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Affiliation(s)
- Simone Marocchi
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
- Universidade de Sao Paulo (IFSC) , Av. Trabalhador são-carlense, São Carlos 400, Brazil
| | - Andrea Candini
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
| | - David Klar
- Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Lotharstrasse 1, Duisburg D-47048, Germany
| | | | - Haibei Huang
- School of Chemistry, University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Filippo Troiani
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
| | - Valdis Corradini
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
| | - Roberto Biagi
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Universitá di Modena e Reggio Emilia , Via Campi 213/A, Modena 41125, Italy
| | - Valentina De Renzi
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Universitá di Modena e Reggio Emilia , Via Campi 213/A, Modena 41125, Italy
| | - Svetlana Klyatskaya
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , Eggenstein-Leopoldshafen D-76344, Germany
| | - Kurt Kummer
- European Synchrotron Radiation Facility (ESRF) , Avenue des Martyrs 71, Grenoble 38043, France
| | - Nicholas B Brookes
- European Synchrotron Radiation Facility (ESRF) , Avenue des Martyrs 71, Grenoble 38043, France
| | - Mario Ruben
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) , Eggenstein-Leopoldshafen D-76344, Germany
- Institut de Physique et Chimie des Materiaux de Strasbourg, UMR 7504 UdS-CNRS , Strasbourg 67034 Cedex 2, France
| | - Heiko Wende
- Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Lotharstrasse 1, Duisburg D-47048, Germany
| | - Umberto Del Pennino
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Universitá di Modena e Reggio Emilia , Via Campi 213/A, Modena 41125, Italy
| | - Alessandro Soncini
- School of Chemistry, University of Melbourne , Melbourne, Victoria 3010, Australia
| | - Marco Affronte
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
- Dipartimento di Scienze Fisiche, Matematiche e Informatiche, Universitá di Modena e Reggio Emilia , Via Campi 213/A, Modena 41125, Italy
| | - Valerio Bellini
- S3, Istituto Nanoscienze, CNR , Via Campi 213/A, Modena 41125, Italy
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17
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Lumetti S, Candini A, Godfrin C, Balestro F, Wernsdorfer W, Klyatskaya S, Ruben M, Affronte M. Single-molecule devices with graphene electrodes. Dalton Trans 2016; 45:16570-16574. [DOI: 10.1039/c6dt02445a] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Design, fabrication and low temperature characterization of a molecular spin transistor made of graphene electrodes and a TbPc2 molecular dot are reported.
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Affiliation(s)
- S. Lumetti
- Istituto Nanoscienze – CNR
- Centro S3 Modena
- 41124 Modena
- Italy
- Dipartimento di Scienze Fisiche
| | - A. Candini
- Istituto Nanoscienze – CNR
- Centro S3 Modena
- 41124 Modena
- Italy
| | - C. Godfrin
- Université Grenoble Alpes
- Institut Néel
- F-38042 Grenoble
- France
- CNRS
| | - F. Balestro
- Université Grenoble Alpes
- Institut Néel
- F-38042 Grenoble
- France
- CNRS
| | - W. Wernsdorfer
- Université Grenoble Alpes
- Institut Néel
- F-38042 Grenoble
- France
- CNRS
| | - S. Klyatskaya
- Institute of Nanotechnology
- Karlsruhe Institute of Technology (KIT)
- D-76344 Eggenstein-Leopoldshafen
- Germany
| | - M. Ruben
- Institute of Nanotechnology
- Karlsruhe Institute of Technology (KIT)
- D-76344 Eggenstein-Leopoldshafen
- Germany
- Institut de Physique et Chimie des Matériaux de Strasbourg
| | - M. Affronte
- Istituto Nanoscienze – CNR
- Centro S3 Modena
- 41124 Modena
- Italy
- Dipartimento di Scienze Fisiche
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