Tailoring magnetic frustration in strained epitaxial FeRh films

Article

关键词: QUASI-RANDOM STRUCTURES;    PHASE-TRANSITION;    ROOM-TEMPERATURE;    RH ALLOYS;    METALS;    DRIVEN;    ENERGY;   

DOI  :  10.1103/PhysRevB.93.104416

来源: SCIE

【 摘 要 】

We report on a strain-induced martensitic transformation, accompanied by a suppression of magnetic order in epitaxial films of chemically disordered FeRh. X-ray diffraction, transmission electronmicroscopy, and electronic structure calculations reveal that the lowering of symmetry (from cubic to tetragonal) imposed by the epitaxial relation leads to a further, unexpected, tetragonal-to-orthorhombic transition, triggered by a band-Jahn-Teller-type lattice instability. The collapse of magnetic order is a direct consequence of this structural change, which upsets the subtle balance between ferromagnetic nearest-neighbor interactions arising from Fe-Rh hybridization and frustrated antiferromagnetic coupling among localized Fe moments at larger distances.

【 授权许可】

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