科研之友
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摘要
The current interest in the field of semiconductor spintronics is mostly focused on transition metal-doped and rare-earth metal-doped binary materials. Recently, however, the explorations of metal-doped ternary semiconductors have gained attention due to experimental confirmations of possible high transition temperature in chalcopyrite compounds. Since the chalcopyrites are ternary materials, there are possibilities of having ferromagnetic or antiferromagnetic configurations, depending on which metal site was substituted by the dopant. Mn-doped ZnGeN2, for example, was found to be antiferromagmetic for Mn-Zn and ferromagnetic for Mn-Ge. A density functional theory study is performed on Gd-doped ternary material ZnGeN2. Our results show Gd-doped ZnGeN2 to be ferromagnetic, independent of the substitution sites. The formation of half-metallic ferromagnetism is possible in this type of material.
- 出版日期2011-4-1
