Article ID Journal Published Year Pages File Type
1867358 Physics Letters A 2010 4 Pages PDF
Abstract

The recent observed glassy ferromagnetism in Al-doped 4H  -SiC is investigated using first principles calculations. We find that the formation energy of VCVC is significantly reduced by Al atoms doped in SiC. The AlSi–VCVC complex induces a half-filled narrow a1a1 level in the band gap and contributes a net local moment of 1 μBμB. The exchange parameter J can be either positive or negative along different directions. Both the strong anisotropy of J   and the correlation effects of the a1a1 level can lead to a glassy ferromagnetism in Al-doped 4H-SiC.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Physics and Astronomy (General)
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