Origin of low-temperature magnetic ordering in Ga1-xMnxN

Article

关键词: FERROMAGNETISM;    SUPEREXCHANGE;    GAN;    SEMICONDUCTORS;    MODEL;   

DOI  :  10.1103/PhysRevB.85.205204

来源: SCIE

【 摘 要 】

By using highly sensitive millikelvin superconducting quantum interference device magnetometry, the magnitude of the Curie temperature as a function of the Mn concentration x is determined for thoroughly characterized Ga1-xMnxN. The interpretation of the results in the frame of tight-binding theory and of Monte Carlo simulations allows us to assign the spin interaction to ferromagnetic superexchange and to point out the limited accuracy of state-of-the-art ab initio methods in predicting the magnetic characteristics of dilute magnetic insulators.

【 授权许可】

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