期刊
PHYSICAL REVIEW B
卷 85, 期 20, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.205204
关键词
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资金
- ERC within the European Community [227690]
- InTechFun [POIG.01.03.01-00-159/08]
- SemiSpinNet [PITNGA-2008-215368]
- Austrian FWF [P20065, P22477, P20550]
- Austrian Science Fund (FWF) [P 22477] Funding Source: researchfish
- European Research Council (ERC) [227690] Funding Source: European Research Council (ERC)
- Austrian Science Fund (FWF) [P20065, P20550] Funding Source: Austrian Science Fund (FWF)
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.
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