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Sartori K, Lopez-Martin R, Choueikani F, Gloter A, Grenèche JM, Begin-Colin S, Taverna D, De Toro JA, Pichon BP. Magnetic anisotropy engineering in onion-structured metal oxide nanoparticles combining dual exchange coupling and proximity effects. NANOSCALE ADVANCES 2024; 6:2903-2918. [PMID: 38817437 PMCID: PMC11134230 DOI: 10.1039/d3na01108a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 03/19/2024] [Indexed: 06/01/2024]
Abstract
A series of exchange-coupled magnetic nanoparticles combining several magnetic phases in an onion-type structure were synthesized by performing a three-step seed-mediated growth process. Iron and cobalt precursors were alternatively decomposed in high-boiling-temperature solvents (288-310 °C) to successively grow CoO and Fe3-δO4 shells (the latter in three stages) on the surface of Fe3-δO4 seeds. The structure and chemical composition of these nanoparticles were investigated in depth by combining a wide panel of advanced techniques, such as scanning transmission electron microscopy (STEM), electron energy-loss spectroscopy-spectrum imaging (EELS-SI), 57Fe Mössbauer spectrometry, and X-ray circular magnetic dichroism (XMCD) techniques. The size of the nanoparticles increased progressively after each thermal decomposition step, but the crystal structure of core-shell nanoparticles was significantly modified during the growth of the second shell. Indeed, the antiferromagnetic CoO phase was progressively replaced by the CoFe2O4 ferrimagnet due to the concomitant processes of partial solubilization/crystallization and the interfacial cationic diffusion of iron. A much more complex chemical structure than that suggested by a simple size variation of the nanoparticles is thus proposed, namely Fe3-δO4@CoO-CoFe2O4@Fe3-δO4, where an intermediate Co-based layer was shown to progressively become a single, hybrid magnetic phase (attributed to proximity effects) with a reduction in the CoO amount. In turn, the dual exchange-coupling of this hybrid Co-based intermediate layer (with high anisotropy and ordering temperature) with the surrounding ferrite (core and outer shells) stabilized the particle moment well above room temperature. These effects allow for the production of Fe oxide-based magnetic nanoparticles with high effective anisotropy, thus revealing the potential of this strategy to design rare-earth-free permanent nanomagnets at room temperature.
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Affiliation(s)
- Kevin Sartori
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 F-67000 Strasbourg France
- Synchrotron SOLEIL L'Orme des Merisiers, Saint Aubin - BP48, 91192 Gif-sur-Yvette France
| | - Raul Lopez-Martin
- Instituto Regional de Investigación Científica Aplicada (IRICA), Departamento de Física Aplicada, Universidad de Castilla-La Mancha 13071 Ciudad Real Spain
| | - Fadi Choueikani
- Synchrotron SOLEIL L'Orme des Merisiers, Saint Aubin - BP48, 91192 Gif-sur-Yvette France
| | - Alexandre Gloter
- Laboratoire de Physique des Solides, CNRS, Université Paris-Saclay 91400 Orsay France
| | - Jean-Marc Grenèche
- Institut des Molécules et Matériaux du Mans, IMMM, UMR CNRS-6283, Le Mans Université Avenue Olivier Messiaen, 72085 Le Mans Cedex 9 France
| | - Sylvie Begin-Colin
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 F-67000 Strasbourg France
| | - Dario Taverna
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, UMR 7590, CNRS, Sorbonne Université 75005 Paris France
| | - Jose A De Toro
- Instituto Regional de Investigación Científica Aplicada (IRICA), Departamento de Física Aplicada, Universidad de Castilla-La Mancha 13071 Ciudad Real Spain
| | - Benoit P Pichon
- Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 F-67000 Strasbourg France
- Institut Universitaire de France 1 Rue Descartes 75231 Paris Cedex 05 France
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2
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Baričić M, Maltoni P, Barucca G, Yaacoub N, Omelyanchik A, Canepa F, Mathieu R, Peddis D. Chemical engineering of cationic distribution in spinel ferrite nanoparticles: the effect on the magnetic properties. Phys Chem Chem Phys 2024; 26:6325-6334. [PMID: 38314612 DOI: 10.1039/d3cp06029b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
A set of ∼9 nm CoFe2O4 nanoparticles substituted with Zn2+ and Ni2+ was prepared by thermal decomposition of metallic acetylacetonate precursors to correlate the effects of replacement of Co2+ with the resulting magnetic properties. Due to the distinct selectivity of these cations for the spinel ferrite crystal sites, we show that it is possible to tailor the magnetic anisotropy, saturation magnetization, and interparticle interactions of the nanoparticles during the synthesis stage. This approach unlocks new possibilities for enhancing the performance of spinel ferrite nanoparticles in specific applications. Particularly, our study shows that the replacement of Co2+ by 48% of Zn2+ ions led to an increase in saturation magnetization of approximately 40% from ∼103 A m2 kg-1 to ∼143 A m2 kg-1, whereas the addition of Ni2+ at a similar percentage led to an ∼30% decrease in saturation magnetization to 68-72 A m2 kg-1. The results of calculations based on the two-sublattice Néel model of magnetization match the experimental findings, demonstrating the model's effectiveness in the strategic design of spinel ferrite nanoparticles with targeted magnetic properties through doping/inversion degree engineering.
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Affiliation(s)
- Miran Baričić
- Dipartimento di Chimica e Chimica Industriale & INSTM, nM2-Lab, Università degli Studi di Genova, Via Dodecaneso 31, Genova, 1-16146, Italy.
| | - Pierfrancesco Maltoni
- Department of Materials Science and Engineering, Uppsala University, Box 35, Uppsala, 751 03, Sweden.
| | - Gianni Barucca
- Dipartimento di Scienze e Ingegneria della Materia, Dell'ambiente ed Urbanistica, Università Politecnica delle Marche, via Brecce Bianche 12, Ancona, Italy
| | - Nader Yaacoub
- Institut des Molécules et Mateŕiaux du Mans, CNRS UMR-6283, Le Mans Université, F-72085 Le Mans, France
| | - Alexander Omelyanchik
- Dipartimento di Chimica e Chimica Industriale & INSTM, nM2-Lab, Università degli Studi di Genova, Via Dodecaneso 31, Genova, 1-16146, Italy.
- Institute of Structure of Matter (ISM), nM2-Lab, National Research Council (CNR), Via Salaria, Km 29,300 00015 Monterotondo Scalo, Roma, Italy
| | - Fabio Canepa
- Dipartimento di Chimica e Chimica Industriale & INSTM, nM2-Lab, Università degli Studi di Genova, Via Dodecaneso 31, Genova, 1-16146, Italy.
| | - Roland Mathieu
- Department of Materials Science and Engineering, Uppsala University, Box 35, Uppsala, 751 03, Sweden.
| | - Davide Peddis
- Dipartimento di Chimica e Chimica Industriale & INSTM, nM2-Lab, Università degli Studi di Genova, Via Dodecaneso 31, Genova, 1-16146, Italy.
- Institute of Structure of Matter (ISM), nM2-Lab, National Research Council (CNR), Via Salaria, Km 29,300 00015 Monterotondo Scalo, Roma, Italy
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3
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Golosovsky IV, Kibalin IA, Gukasov A, Roca AG, López-Ortega A, Estrader M, Vasilakaki M, Trohidou KN, Hansen TC, Puente-Orench I, Lelièvre-Berna E, Nogués J. Elucidating Individual Magnetic Contributions in Bi-Magnetic Fe 3 O 4 /Mn 3 O 4 Core/Shell Nanoparticles by Polarized Powder Neutron Diffraction. SMALL METHODS 2023; 7:e2201725. [PMID: 37391272 DOI: 10.1002/smtd.202201725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 05/10/2023] [Indexed: 07/02/2023]
Abstract
Heterogeneous bi-magnetic nanostructured systems have had a sustained interest during the last decades owing to their unique magnetic properties and the wide range of derived potential applications. However, elucidating the details of their magnetic properties can be rather complex. Here, a comprehensive study of Fe3 O4 /Mn3 O4 core/shell nanoparticles using polarized neutron powder diffraction, which allows disentangling the magnetic contributions of each of the components, is presented. The results show that while at low fields the Fe3 O4 and Mn3 O4 magnetic moments averaged over the unit cell are antiferromagnetically coupled, at high fields, they orient parallel to each other. This magnetic reorientation of the Mn3 O4 shell moments is associated with a gradual evolution with the applied field of the local magnetic susceptibility from anisotropic to isotropic. Additionally, the magnetic coherence length of the Fe3 O4 cores shows some unusual field dependence due to the competition between the antiferromagnetic interface interaction and the Zeeman energies. The results demonstrate the great potential of the quantitative analysis of polarized neutron powder diffraction for the study of complex multiphase magnetic materials.
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Affiliation(s)
- I V Golosovsky
- National Research Center "Kurchatov Institute", B. P. Konstantinov Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia
| | - I A Kibalin
- Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, Gif-sur-Yvette, 91191, France
| | - A Gukasov
- Laboratoire Léon Brillouin, CEA-CNRS, CE-Saclay, Gif-sur-Yvette, 91191, France
| | - A G Roca
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, 08193, Spain
| | - A López-Ortega
- Departamento de Ciencias, Universidad Pública de Navarra, Pamplona, 31006, Spain
- Institute for Advanced Materials and Mathematics INAMAT2, Universidad Pública de Navarra, Pamplona, 31006, Spain
| | - M Estrader
- Departament de Química Inorgànica i Orgànica, carrer Martí i Franqués 1-11, Universitat de Barcelona, Barcelona, 08028, Spain
- Institut de Nanociència i Nanotecnologia IN2UB, carrer Martí i Franqués 1-11, Universitat de Barcelona, Barcelona, 08028, Spain
| | - M Vasilakaki
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", 153 10, Agia Paraskevi, Attiki, 15310, Greece
| | - K N Trohidou
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", 153 10, Agia Paraskevi, Attiki, 15310, Greece
| | - T C Hansen
- Institut Laue Langevin, 71 avenue des Martyrs, Grenoble, 38000, France
| | - I Puente-Orench
- Institut Laue Langevin, 71 avenue des Martyrs, Grenoble, 38000, France
- Instituto de NanoCiencia y Materiales de Aragón, Zaragoza, 50009, Spain
| | - E Lelièvre-Berna
- Institut Laue Langevin, 71 avenue des Martyrs, Grenoble, 38000, France
| | - J Nogués
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, 08193, Spain
- ICREA, Barcelona, 08010, Spain
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García‐Acevedo P, González‐Gómez MA, Arnosa‐Prieto Á, de Castro‐Alves L, Piñeiro Y, Rivas J. Role of Dipolar Interactions on the Determination of the Effective Magnetic Anisotropy in Iron Oxide Nanoparticles. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2203397. [PMID: 36509677 PMCID: PMC9929252 DOI: 10.1002/advs.202203397] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 11/10/2022] [Indexed: 05/14/2023]
Abstract
Challenging magnetic hyperthermia (MH) applications of immobilized magnetic nanoparticles require detailed knowledge of the effective anisotropy constant (Keff ) to maximize heat release. Designing optimal MH experiments entails the precise determination of magnetic properties, which are, however, affected by the unavoidable concurrence of magnetic interactions in common experimental conditions. In this work, a mean-field energy barrier model (ΔE), accounting for anisotropy (EA ) and magnetic dipolar (ED ) energy, is proposed and used in combination with AC measurements to a specifically developed model system of spherical magnetic nanoparticles with well-controlled silica shells, acting as a spacer between the magnetic cores. This approach makes it possible to experimentally demonstrate the mean field dipolar interaction energy prediction with the interparticle distance, dij , ED ≈ 1/dij 3 and obtain the EA as the asymptotic limit for very large dij . In doing so, Keff uncoupled from interaction contributions is obtained for the model system (iron oxide cores with average sizes of 8.1, 10.2, and 15.3 nm) revealing to be 48, 23, and 11 kJ m-3 , respectively, close to bulk magnetite/maghemite values and independent from the specific spacing shell thicknesses selected for the study.
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Affiliation(s)
- Pelayo García‐Acevedo
- NANOMAG LaboratoryApplied Physics DepartmentMaterials Institute (iMATUS)Universidade de Santiago de CompostelaSantiago de Compostela15782Spain
| | - Manuel A. González‐Gómez
- NANOMAG LaboratoryApplied Physics DepartmentMaterials Institute (iMATUS)Universidade de Santiago de CompostelaSantiago de Compostela15782Spain
| | - Ángela Arnosa‐Prieto
- NANOMAG LaboratoryApplied Physics DepartmentMaterials Institute (iMATUS)Universidade de Santiago de CompostelaSantiago de Compostela15782Spain
| | - Lisandra de Castro‐Alves
- NANOMAG LaboratoryApplied Physics DepartmentMaterials Institute (iMATUS)Universidade de Santiago de CompostelaSantiago de Compostela15782Spain
| | - Yolanda Piñeiro
- NANOMAG LaboratoryApplied Physics DepartmentMaterials Institute (iMATUS)Universidade de Santiago de CompostelaSantiago de Compostela15782Spain
| | - José Rivas
- NANOMAG LaboratoryApplied Physics DepartmentMaterials Institute (iMATUS)Universidade de Santiago de CompostelaSantiago de Compostela15782Spain
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5
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Muscas G, Congiu F, Concas G, Cannas C, Mameli V, Yaacoub N, Hassan RS, Fiorani D, Slimani S, Peddis D. The Boundary Between Volume and Surface-Driven Magnetic Properties in Spinel Iron Oxide Nanoparticles. NANOSCALE RESEARCH LETTERS 2022; 17:98. [PMID: 36219264 PMCID: PMC9554062 DOI: 10.1186/s11671-022-03737-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
Despite modern preparation techniques offer the opportunity to tailor the composition, size, and shape of magnetic nanoparticles, understanding and hence controlling the magnetic properties of such entities remains a challenging task, due to the complex interplay between the volume-related properties and the phenomena occurring at the particle's surface. The present work investigates spinel iron oxide nanoparticles as a model system to quantitatively analyze the crossover between the bulk and the surface-dominated magnetic regimes. The magnetic properties of ensembles of nanoparticles with an average size in the range of 5-13 nm are compared. The role of surface anisotropy and the effect of oleic acid, one of the most common and versatile organic coatings, are discussed. The structural and morphological properties are investigated by X-ray diffraction and transmission electron microscopy. The size dependence of the surface contribution to the effective particle anisotropy and the magnetic structure are analyzed by magnetization measurements and in-field Mössbauer spectrometry. The structural data combined with magnetometry and Mössbauer spectrometry analysis are used to shed light on this complex scenario revealing a crossover between volume and surface-driven properties in the range of 5-7 nm.
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Affiliation(s)
- Giuseppe Muscas
- Department of Physics, University of Cagliari, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy.
| | - Francesco Congiu
- Department of Physics, University of Cagliari, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Giorgio Concas
- Department of Physics, University of Cagliari, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Carla Cannas
- Università Degli Studi Di Cagliari, Dipartimento Di Scienze Chimiche E Geologiche, and INSTM, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Valentina Mameli
- Università Degli Studi Di Cagliari, Dipartimento Di Scienze Chimiche E Geologiche, and INSTM, Cittadella Universitaria Di Monserrato, S.P. 8 Km 0.700, 09042, Monserrato, CA, Italy
| | - Nader Yaacoub
- IMMM, Le Mans Université, CNRS UMR-6283, Avenue Olivier Messiaen, 72085, Le Mans, France
| | - Rodaina Sayed Hassan
- IMMM, Le Mans Université, CNRS UMR-6283, Avenue Olivier Messiaen, 72085, Le Mans, France
- Department of Physics, Faculty of Science, Lebanese University, Beirut, Lebanon
| | - Dino Fiorani
- Istituto Di Struttura Della Materia-CNR, 00015, Monterotondo Scalo, RM, Italy
| | - Sawssen Slimani
- Dipartimento Di Chimica E Chimica Industriale, Università Degli Studi Di Genova, Via Dodecaneso 31, 1-16146, Genoa, Italy
- Istituto Di Struttura Della Materia-CNR, 00015, Monterotondo Scalo, RM, Italy
| | - Davide Peddis
- Dipartimento Di Chimica E Chimica Industriale, Università Degli Studi Di Genova, Via Dodecaneso 31, 1-16146, Genoa, Italy.
- Istituto Di Struttura Della Materia-CNR, 00015, Monterotondo Scalo, RM, Italy.
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6
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Goswami S, Gupta P, Nayak S, Bedanta S, Iglesias Ò, Chakraborty M, De D. Dependence of Exchange Bias on Interparticle Interactions in Co/CoO Core/Shell Nanostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3159. [PMID: 36144947 PMCID: PMC9502722 DOI: 10.3390/nano12183159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/04/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
This article reports the dependence of exchange bias (EB) effect on interparticle interactions in nanocrystalline Co/CoO core/shell structures, synthesized using the conventional sol-gel technique. Analysis via powder X-Ray diffraction (PXRD) studies and transmission electron microscope (TEM) images confirm the presence of crystalline phases of core/shell Co/CoO with average particle size ≈ 18 nm. Volume fraction (φ) is varied (from 20% to 1%) by the introduction of a stoichiometric amount of non-magnetic amorphous silica matrix (SiO2) which leads to a change in interparticle interaction (separation). The influence of exchange and dipolar interactions on the EB effect, caused by the variation in interparticle interaction (separation) is studied for a series of Co/CoO core/shell nanoparticle systems. Studies of thermal variation of magnetization (M-T) and magnetic hysteresis loops (M-H) for the series point towards strong dependence of magnetic properties on dipolar interaction in concentrated assemblies whereas individual nanoparticle response is dominant in isolated nanoparticle systems. The analysis of the EB effect reveals a monotonic increase of coercivity (HC) and EB field (HE) with increasing volume fraction. When the nanoparticles are close enough and the interparticle interaction is significant, collective behavior leads to an increase in the effective antiferromagnetic (AFM) CoO shell thickness which results in high HC and HE. Moreover, in concentrated assemblies, the dipolar field superposes to the local exchange field and enhances the EB effect contributing as an additional source of unidirectional anisotropy.
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Affiliation(s)
- Suchandra Goswami
- Material Science Research Lab, The Neotia University, Sarisa, D.H. Road, 24 Pgs (South), Sarisha 743368, West Bengal, India
| | - Pushpendra Gupta
- Laboratory for Nanomagnetism and Magnetic Materials (LNMM), School of Physical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Jatni 752050, India
| | - Sagarika Nayak
- Laboratory for Nanomagnetism and Magnetic Materials (LNMM), School of Physical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Jatni 752050, India
| | - Subhankar Bedanta
- Laboratory for Nanomagnetism and Magnetic Materials (LNMM), School of Physical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Jatni 752050, India
- Center for Interdisciplinary Sciences (CIS), National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute (HBNI), Jatni 752050, India
| | - Òscar Iglesias
- Department Física de la Matèria Condensada and IN2UB, Facultat de Física, Universitat de Barcelona, Av. Diagonal 647, 08028 Barcelona, Spain
| | - Manashi Chakraborty
- Material Science Research Lab, The Neotia University, Sarisa, D.H. Road, 24 Pgs (South), Sarisha 743368, West Bengal, India
| | - Debajyoti De
- Material Science Research Lab, The Neotia University, Sarisa, D.H. Road, 24 Pgs (South), Sarisha 743368, West Bengal, India
- Department of Physics, Sukumar Sengupta Mahavidyalaya, State Highway 7, Keshpur, Paschim Medinipur 721150, India
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