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Spin-glass-like behavior in SmFeAsO0.8F0.2. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Gundogdu S, Clancy JP, Xu G, Zhao Y, Dube PA, Karalar TC, Cho BK, Lynn JW, Ramazanoglu M. Magnetic order and competition with superconductivity in (Ho-Er)Ni 2B 2C. MATERIALS RESEARCH EXPRESS 2020; 7:10.1088/2053-1591/abc998. [PMID: 37719937 PMCID: PMC10502616 DOI: 10.1088/2053-1591/abc998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
The rare earth magnetic order in pure and doped H o ( 1 - x ) E r x N i 2 B 2 C (x = 0, 0.25, 0.50, 0.75, 1) single crystal samples was investigated using magnetization and neutron diffraction measurements. Superconducting quaternary borocarbides, R N i 2 B 2 C where R = Ho, Er , are magnetic intermetallic superconductors with the transition temperatures~10 K in which long range magnetic order develops in the same temperature range and competes with superconductivity. Depending on the rare earth composition the coupling between superconductivity and magnetism creates several phases, ranging from a near reentrant superconductor with a mixture of commensurate and incommensurate antiferromagnetism to an incommensurate antiferromagnetic spin modulation with a weak ferromagnetic component. All of these phases coexist with superconductivity. RKKY magnetic interactions are used to describe the magnetic orders in the pure compounds. However, the doping of Er on Ho sites which have two strong magnetic moments with two different easy directions creates new and complicated magnetic modulations with possible local disorder effects. One fascinating effect is the development of an induced magnetic state resembling the pure and doped R2CuO4 cuprate with R = Nd and Pr.
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Affiliation(s)
- Suleyman Gundogdu
- Physics Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - J Patrick Clancy
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1 Canada
| | - Guangyong Xu
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States of America
| | - Yang Zhao
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States of America
| | - Paul A Dube
- Brockhouse Institute for Materials Research, Hamilton, ON L8S 4M1, Canada
| | - Tufan C Karalar
- Electronics and Communication Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
| | - Beong Ki Cho
- Gwangju Institute of Science and Technology, GIST, Republic of Korea
| | - Jeffrey W Lynn
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States of America
| | - M Ramazanoglu
- Physics Engineering Department, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey
- Brockhouse Institute for Materials Research, Hamilton, ON L8S 4M1, Canada
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Xing X, Zhou W, Wang J, Zhu Z, Zhang Y, Zhou N, Qian B, Xu X, Shi Z. Two-band and pauli-limiting effects on the upper critical field of 112-type iron pnictide superconductors. Sci Rep 2017; 7:45943. [PMID: 28383529 PMCID: PMC5382916 DOI: 10.1038/srep45943] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 03/07/2017] [Indexed: 11/30/2022] Open
Abstract
The temperature dependence of upper critical field μ0Hc2 of Ca0.83La0.17FeAs2 and Ca0.8La0.2Fe0.98Co0.02As2 single crystals are investigated by measuring the resistivity for the inter-plane (H//c) and in-plane (H//ab) directions in magnetic fields up to 60 T. It is found that μ0Hc2(T) of both crystals for H//c presents a sublinear temperature dependence with decreasing temperature, whereas the curve of μ0Hc2(T) for H//ab has a convex curvature and gradually tends to saturate at low temperatures. μ0Hc2(T) in both crystals deviates from the conventional Werthamer-Helfand-Hohenberg (WHH) theoretical model without considering spin paramagnetic effect for H//c and H//ab directions. Detailed analyses show that the behavior of μ0Hc2(T) in 112-type Iron-based superconductors (IBSs) is similar to that of most IBSs. Two-band model is required to fully reproduce the behavior of μ0Hc2(T) for H//c, while the effect of spin paramagnetic effect is responsible for the behavior of μ0Hc2(T) for H//ab.
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Affiliation(s)
- Xiangzhuo Xing
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
| | - Wei Zhou
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
| | - Jinhua Wang
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zengwei Zhu
- Wuhan National High Magnetic Field Center, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yufeng Zhang
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
| | - Nan Zhou
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
| | - Bin Qian
- Advanced Functional Materials Lab and Department of Physics, Changshu Institute of Technology, Changshu 215500, China
| | - Xiaofeng Xu
- Advanced Functional Materials Lab and Department of Physics, Changshu Institute of Technology, Changshu 215500, China
| | - Zhixiang Shi
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
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Scanderbeg DJ, Taylor BJ, Baumbach RE, Paglione J, Maple MB. Electrical and thermal transport properties of the electron-doped cuprate Sm 2-x Ce x CuO 4-y system. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:485702. [PMID: 27705951 DOI: 10.1088/0953-8984/28/48/485702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Electrical and thermal transport measurements were performed on thin films of the electron-doped superconductor Sm2-x Ce x CuO4-y (x = 0.13 - 0.19) in order to study the evolving nature of the charge carriers from the under-doped to over-doped regime. A temperature versus cerium content (T - x) phase diagram has been constructed from the electrical transport measurements, yielding a superconducting region similar to that found for other electron-doped superconductors. Thermopower measurements show a dramatic change from the underdoped region (x < 0.15) to the overdoped region (x > 0.15). Application of the Fisher-Fisher-Huse (FFH) vortex glass scaling model to the magnetoresistance data was found to be insufficient to describe the data in the region of the vortex-solid to vortex-liquid transition. It was found instead that the modified vortex glass scaling model of Rydh, Rapp, and Anderson provided a good description of the data, indicating the importance of the applied field on the pinning landscape. A magnetic field versus temperature (H - T) phase diagram has also been constructed for the films with [Formula: see text], displaying the evolution of the vortex glass melting lines H g (T) across the superconducting regime.
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Korshunov MM, Zakharova EV, Nekrasov IA, Pchelkina ZV, Ovchinnikov SG. The Fermi surface and the role of electronic correlations in Sm(2-x)Ce(x)CuO4. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:015701. [PMID: 21386232 DOI: 10.1088/0953-8984/22/1/015701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Using a LDA+GTB (local density approximation+generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high- T(c) material Sm(2-x)Ce(x)CuO(4). Parameters of the minimal tight-binding model for this system (the so-called three-band Emery model) were obtained within the NMTO (Nth-order muffin-tin orbital) method. The doping evolution of the dispersion and the Fermi surface in the presence of electronic correlations was investigated in two regimes of magnetic order: short-range (spin-liquid) and long-range (antiferromagnetic metal). Each regime is characterized by the specific topologies of the Fermi surfaces and we discuss their relation to recent experimental data.
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Affiliation(s)
- M M Korshunov
- Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany.
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Prozorov R, Lawrie DD, Hetel I, Fournier P, Giannetta RW. Field-dependent diamagnetic transition in magnetic superconductor Sm1.85Ce0.15CuO4-y. PHYSICAL REVIEW LETTERS 2004; 93:147001. [PMID: 15524829 DOI: 10.1103/physrevlett.93.147001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2004] [Indexed: 05/24/2023]
Abstract
The magnetic penetration depth of single crystal Sm(1.85)Ce(0.15)CuO(4-y) was measured down to 0.4 K in dc fields up to 7 kOe. For insulating Sm2CuO4, Sm3+ spins order at the Ne el temperature, T(N)=6 K, independent of the applied field. Superconducting Sm(1.85)Ce(0.15)CuO(4-y) (T(c) approximately 23 K) shows a sharp increase in diamagnetic screening below T(*)(H) which varied from 4.0 K (H=0) to 0.5 K (H=7 kOe) for a field along the c axis. If the field was aligned parallel to the conducting planes, T(*) remained unchanged. The unusual field dependence of T(*) indicates a spin-freezing transition that dramatically increases the superfluid density.
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Affiliation(s)
- R Prozorov
- Loomis Laboratory of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801, USA
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Blanchard S, Klein T, Marcus J, Joumard I, Sulpice A, Szabo P, Samuely P, Jansen AGM, Marcenat C. Anomalous magnetic field dependence of the thermodynamic transition line in the isotropic superconductor (K,Ba)BiO3. PHYSICAL REVIEW LETTERS 2002; 88:177201. [PMID: 12005780 DOI: 10.1103/physrevlett.88.177201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2001] [Indexed: 05/23/2023]
Abstract
Thermodynamic (specific heat, reversible magnetization, tunneling spectroscopy) and transport measurements have been performed on high quality (K,Ba)BiO3 single crystals. The temperature dependence of the magnetic field H(C(p)) corresponding to the onset of the specific heat anomaly presents a clear positive curvature. H(C(p)) is significantly smaller than the field H(Delta) for which the superconducting gap vanishes but is closely related to the irreversibility line deduced from transport data. Moreover, the temperature dependence of the reversible magnetization presents a strong deviation from the Ginzburg-Landau theory emphasizing the peculiar nature of the superconducting transition in this material.
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Affiliation(s)
- S Blanchard
- Laboratoire d'Etudes des Propriétés Electroniques des Solides, Centre National de la Recherche Scientifique, BP 166, F-38042 Grenoble Cedex 9, France
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Sundaresan A, Maignan A, Raveau B. Evidence for 2D-3D magnetic ordering of Gd in high-Tc-related CaGdCuO3Cl and Ca4R2Cu3O8Cl4 (R=Gd,Sm). PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:12576-12581. [PMID: 9985123 DOI: 10.1103/physrevb.54.12576] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Strach T, Ruf T, Cardona M, Lin CT, Jandl S, Nekvasil V, Zhigunov DI, Barilo SN, Shiryaev SV. Raman study of intermultiplet crystal-field transitions in Sm2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:4276-4282. [PMID: 9986331 DOI: 10.1103/physrevb.54.4276] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Almasan CC, Maple MB. Crossover from three-dimensional to two-dimensional vortex fluctuations in the irreversibility line of the Y1-xPrxBa2Cu3O7- delta (0 <~ x <~ 0.55) system. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:2882-2885. [PMID: 9983801 DOI: 10.1103/physrevb.53.2882] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Martins GB, Rao D, Valdivia JA, Pires MA, Barberis GE, Rettori C, Venegas PA, Oseroff S, Fisk Z. ESR of Gd3+ and Er3+ in Pr2-xCexCuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:11909-11914. [PMID: 9977932 DOI: 10.1103/physrevb.51.11909] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Walker DJ, Laborde O, Mackenzie AP, Julian SR, Carrington A, Loram JW, Cooper JR. Resistive upper critical field of thin films of underdoped YBa2(Cu0.97Zn0.03)3O7- delta. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:9375-9378. [PMID: 9977592 DOI: 10.1103/physrevb.51.9375] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Sumarlin IW, Lynn JW, Chattopadhyay T, Barilo SN, Zhigunov DI, Peng JL. Magnetic structure and spin dynamics of the Pr and Cu in Pr2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:5824-5839. [PMID: 9979494 DOI: 10.1103/physrevb.51.5824] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Wiegelmann H, Stepanov AA, Vitebsky IM, Jansen AG, Wyder P. Magnetoelectric effect in Gd2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:10039-10042. [PMID: 10009820 DOI: 10.1103/physrevb.49.10039] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Klamut PW, Drulis H, Olejniczak J. Effect of hydrogen doping on the properties of Sm1.93Sr0.07CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:13145-13148. [PMID: 10007695 DOI: 10.1103/physrevb.48.13145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Yang HD, Meen TH, Chen YC. Occurrence of weak ferromagnetism in T'-(R1-xYx)2CuO4 (R=Sm and Eu). PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:7720-7723. [PMID: 10006951 DOI: 10.1103/physrevb.48.7720] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kaplan SG, Noh TW, Sievers AJ, Cheong SW, Fisk Z. Far-infrared antiferromagnetic resonance in Gd2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5300-5314. [PMID: 10006696 DOI: 10.1103/physrevb.47.5300] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Almasan CC, Dalichaouch Y, Neumeier JJ, Seaman CL, Maple MB, Guertin RP, Kuric MV, Garland JC. Evidence for scaling invariance and universality of the irreversibility line of high temperature superconductors. PHYSICAL REVIEW LETTERS 1992; 69:3812-3815. [PMID: 10046920 DOI: 10.1103/physrevlett.69.3812] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Chattopadhyay T, Brown PJ, Roessli B, Stepanov AA, Barilo SN, Zhigunov DI. Magnetic ordering of Cu in Gd2CuO4. PHYSICAL REVIEW. B, CONDENSED MATTER 1992; 46:5731-5734. [PMID: 10004365 DOI: 10.1103/physrevb.46.5731] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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