Spin model for nontrivial types of magnetic order in inverse-perovskite antiferromagnets

Article

关键词: NEGATIVE THERMAL-EXPANSION;    TRANSITION;    MN3GAC;    MULTIFERROICS;    MN3ZNC;    PHASE;   

DOI  :  10.1103/PhysRevB.97.060401

来源: SCIE

【 摘 要 】

Nontrivial magnetic orders in the inverse-perovskite manganese nitrides are theoretically studied by constructing a classical spin model describing the magnetic anisotropy and frustrated exchange interactions inherent in specific crystal and electronic structures of these materials. With a replica-exchange Monte Carlo technique, a theoretical analysis of this model reproduces the experimentally observed triangular Gamma(5g) and Gamma(4g) spin-ordered patterns and the systematic evolution ofmagnetic orders. Our Rapid Communication solves a 40-year-old problem of nontrivial magnetism for the inverse-perovskite manganese nitrides and provides a firm basis for clarifying the magnetism-driven negative thermal expansion phenomenon discovered in this class of materials.

【 授权许可】

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