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Possible ground states and parallel magnetic-field-driven phase transitions of collinear antiferromagnets
Li H.-F.
2016-10-14
Source Publicationnpj Computational Materials
ISSN20573960
Volume2
AbstractUnderstanding the nature of all possible ground states and especially magnetic-field-driven phase transitions of antiferromagnets represents a major step towards unravelling the real nature of interesting phenomena such as superconductivity, multiferroicity or magnetoresistance in condensed-matter science. Here a consistent mean-field calculation endowed with antiferromagnetic (AFM) exchange interaction (J), easy axis anisotropy ( 3), uniaxial single-ion anisotropy (D) and Zeeman coupling to a magnetic field parallel to the AFM easy axis consistently unifies the AFM state, spin-flop (SFO) and spin-flip transitions. We reveal some mathematically allowed exotic spin states and fluctuations depending on the relative coupling strength of (J, 3 and D). We build the three-dimensional (J, 3 and D) and two-dimensional ( 3 and D) phase diagrams clearly displaying the equilibrium phase conditions and discuss the origins of various magnetic states as well as their transitions in different couplings. Besides the traditional first-order type one, we unambiguously confirm an existence of a second-order type SFO transition. This study provides an integrated theoretical model for the magnetic states of collinear antiferromagnets with two interpenetrating sublattices and offers a practical approach as an alternative to the estimation of magnetic exchange parameters (J, 3 and D), and the results may shed light on nontrivial magnetism-related properties of bulks, thin films and nanostructures of correlated electron systems.
DOI10.1038/npjcompumats.2016.32
URLView the original
Language英語
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被引频次[WOS]:4   [WOS记录]     [WOS相关记录]
Document TypeJournal article
专题University of Macau
AffiliationUniversidade de Macau
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Li H.-F.. Possible ground states and parallel magnetic-field-driven phase transitions of collinear antiferromagnets[J]. npj Computational Materials,2016,2.
APA Li H.-F..(2016).Possible ground states and parallel magnetic-field-driven phase transitions of collinear antiferromagnets.npj Computational Materials,2.
MLA Li H.-F.."Possible ground states and parallel magnetic-field-driven phase transitions of collinear antiferromagnets".npj Computational Materials 2(2016).
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