Uniaxial pressure-induced half-metallic ferromagnetic phase transition in LaMnO3

Article

关键词: COLOSSAL MAGNETORESISTANCE;    MANGANITES;    ELECTRODES;    OXIDES;    MN;   

DOI  :  10.1103/PhysRevB.93.094409

来源: SCIE

【 摘 要 】

We use first-principles theory to predict that the application of uniaxial compressive strain leads to a transition from an antiferromagnetic insulator to a ferromagnetic half-metal phase in LaMnO3. We identify the Q2 Jahn-Teller mode as the primary mechanism that drives the transition, indicating that this mode can be used to tune the lattice, charge, and spin coupling. Applying similar or equal to 6 GPa of uniaxial pressure along the [010] direction activates the transition to a half-metallic pseudocubic state. The half-metallicity opens the possibility of producing colossal magnetoresistance in the stoichiometric LaMnO3 compound at significantly lower pressure compared to recently observed investigations using hydrostatic pressure.

【 授权许可】

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