Origin of low-temperature magnetic ordering in Ga 1-xMn xN

Citation:

Sawicki M, Devillers T, Gałȩski S, Simserides C, Dobkowska S, Faina B, Grois A, Navarro-Quezada A, Trohidou KN, Majewski JA, et al. Origin of low-temperature magnetic ordering in Ga 1-xMn xN. Physical Review B - Condensed Matter and Materials Physics [Internet]. 2012;85:205204.

Abstract:

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 Ga1xMnxN. 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.

Notes:

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