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Tada K, Mori M, Tanaka S. Spin Contamination Errors in DFT+ U/Plane-wave Calculations for Li xFeF 3 Systems (x = 0–1). CHEM LETT 2021. [DOI: 10.1246/cl.210040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kohei Tada
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Masahiro Mori
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
| | - Shingo Tanaka
- Research Institute of Electrochemical Energy, Department of Energy and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan
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Perez FA, Borisov P, Johnson TA, Stanescu TD, Trappen R, Holcomb MB, Lederman D, Fitzsimmons MR, Aczel AA, Hong T. Phase diagram of a three-dimensional antiferromagnet with random magnetic anisotropy. PHYSICAL REVIEW LETTERS 2015; 114:097201. [PMID: 25793845 DOI: 10.1103/physrevlett.114.097201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Indexed: 06/04/2023]
Abstract
Three-dimensional antiferromagnets with random magnetic anisotropy (RMA) that have been experimentally studied to date have competing two-dimensional and three-dimensional exchange interactions which can obscure the authentic effects of RMA. The magnetic phase diagram of Fe_{x}Ni_{1-x}F_{2} epitaxial thin films with true random single-ion anisotropy was deduced from magnetometry and neutron scattering measurements and analyzed using mean-field theory. Regions with uniaxial, oblique, and easy-plane anisotropies were identified. A RMA-induced glass region was discovered where a Griffiths-like breakdown of long-range spin order occurs.
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Affiliation(s)
- Felio A Perez
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - Pavel Borisov
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - Trent A Johnson
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - Tudor D Stanescu
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - Robbyn Trappen
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - Mikel B Holcomb
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - David Lederman
- Department of Physics and Astronomy, West Virginia University, Morgantown, West Virginia 26506-6315, USA
| | - M R Fitzsimmons
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Adam A Aczel
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Tao Hong
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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Silevitch DM, Bitko D, Brooke J, Ghosh S, Aeppli G, Rosenbaum TF. A ferromagnet in a continuously tunable random field. Nature 2007; 448:567-70. [PMID: 17671498 DOI: 10.1038/nature06050] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2007] [Accepted: 06/19/2007] [Indexed: 11/09/2022]
Abstract
Most physical and biological systems are disordered, even though the majority of theoretical models treat disorder as a weak perturbation. One particularly simple system is a ferromagnet approaching its Curie temperature, T(C), where all of the spins associated with partially filled atomic shells acquire parallel orientation. With the addition of disorder by way of chemical substitution, the Curie point is suppressed, but no qualitatively new phenomena appear in bulk measurements as long as the disorder is truly random on the atomic scale and not so large as to eliminate ferromagnetism entirely. Here we report the discovery that a simply measured magnetic response is singular above the Curie temperature of a model, disordered magnet, and that the associated singularity grows to an anomalous divergence at T(C). The origin of the singular response is the random internal field induced by an external magnetic field transverse to the favoured direction for magnetization. The fact that ferromagnets can be studied easily and with high precision using bulk susceptibility and a large variety of imaging tools will not only advance fundamental studies of the random field problem, but also suggests a mechanism for tuning the strength of domain wall pinning, the key to applications.
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Affiliation(s)
- D M Silevitch
- The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637, USA
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Campostrini M, Pelissetto A, Rossi P, Vicari E. Improved high-temperature expansion and critical equation of state of three-dimensional Ising-like systems. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1999; 60:3526-63. [PMID: 11970188 DOI: 10.1103/physreve.60.3526] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/1999] [Indexed: 04/18/2023]
Abstract
High-temperature series are computed for a generalized three-dimensional Ising model with arbitrary potential. Three specific "improved" potentials (suppressing leading scaling corrections) are selected by Monte Carlo computation. Critical exponents are extracted from high-temperature series specialized to improved potentials, achieving high accuracy; our best estimates are gamma=1.2371(4), nu=0.630 02(23), alpha=0.1099(7), eta=0.0364(4), beta=0.326 48(18). By the same technique, the coefficients of the small-field expansion for the effective potential (Helmholtz free energy) are computed. These results are applied to the construction of parametric representations of the critical equation of state. A systematic approximation scheme, based on a global stationarity condition, is introduced (the lowest-order approximation reproduces the linear parametric model). This scheme is used for an accurate determination of universal ratios of amplitudes. A comparison with other theoretical and experimental determinations of universal quantities is presented.
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Affiliation(s)
- M Campostrini
- Dipartimento di Fisica dell'Università di Pisa and INFN, I-56126 Pisa, Italy.
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Blote HWJ, Luijten E, Heringa JR. Ising universality in three dimensions: a Monte Carlo study. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4470/28/22/007] [Citation(s) in RCA: 257] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hasenbusch M. A Monte Carlo study of leading order scaling corrections of phi4theory on a three-dimensional lattice. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0305-4470/32/26/304] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Belanger DP, Wang J, Slanic Z, Han SJ, Nicklow RM, Lui M, Ramos CA, Lederman D. Magnetic order in the random-field Ising film Fe0.52Zn0.48F2. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 54:3420-3427. [PMID: 9986242 DOI: 10.1103/physrevb.54.3420] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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9
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Marinelli M, Mercuri F, Belanger DP. Specific heat, thermal diffusivity, and thermal conductivity of FeF2 at the Néel temperature. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:8897-8903. [PMID: 9977527 DOI: 10.1103/physrevb.51.8897] [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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Lederman D, Ramos CA, Jaccarino V, Cardy JL. Finite-size scaling in FeF2/ZnF2 superlattices. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:8365-8375. [PMID: 10007031 DOI: 10.1103/physrevb.48.8365] [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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Belanger DP, Yoshizawa H. Neutron-scattering study of the random-exchange Ising system FexZn1-xF2 near the percolation threshold. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:5051-5058. [PMID: 10006668 DOI: 10.1103/physrevb.47.5051] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Belanger DP, Murray WE, Montenegro FC, King AR, Jaccarino V, Erwin RW. Neutron-scattering study of an Ising antiferromagnet above the percolation threshold: Random-field-induced spin-glass-like behavior in Fe0.31Zn0.69F2. PHYSICAL REVIEW. B, CONDENSED MATTER 1991; 44:2161-2168. [PMID: 9999765 DOI: 10.1103/physrevb.44.2161] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ramos CA, King AR, Jaccarino V. Equation-of-state analysis of the effects of an induced staggered field on the phase transition of CoF2. PHYSICAL REVIEW. B, CONDENSED MATTER 1989; 40:7124-7132. [PMID: 9991098 DOI: 10.1103/physrevb.40.7124] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ramos CA, King AR, Jaccarino V. Determination of the crossover exponent in the random-field system MnxZn. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:5483-5492. [PMID: 9943737 DOI: 10.1103/physrevb.37.5483] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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16
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Rosov N, Kleinhammes A, Lidbjork P, Hohenemser C, Eibschutz M. Single-crystal Mössbauer measurement of the critical exponent beta in the random-exchange Ising system Fe0.9Zn. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:3265-3274. [PMID: 9944913 DOI: 10.1103/physrevb.37.3265] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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17
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Belanger DP, King AR, Ferreira IB, Jaccarino V. Concentration inhomogeneities in random magnets. II. Effects on critical-phenomena studies. PHYSICAL REVIEW. B, CONDENSED MATTER 1988; 37:226-235. [PMID: 9943567 DOI: 10.1103/physrevb.37.226] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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