New class of diluted ferromagnetic semiconductors based on CaO without transition metal elements

被引：138

作者：

Kenmochi, K ^{[1
]}

Seike, M ^{[1
]}

Sato, K ^{[1
]}

Yanase, A ^{[1
]}

Katayama-Yoshida, H ^{[1
]}

机构：

[1] Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2004年 / 43卷 / 7A期

关键词：

materials design; ab initio calculation; calcium oxide; p-impurity band; ferromagnetism without transition metal elements;

D O I：

10.1143/JJAP.43.L934

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a new class of diluted magnetic semiconductors based on CaO without transition metal elements. The electronic structure and the magnetic properties of B-, C- or N-doped CaO are calculated by using the Korringa-Kohn-Rostoker method within the local spin density approximation. The substitutional and magnetic disorder is taken into account by the coherent potential approximation. It is found that B, C and N impurities show finite local magnetic moments in CaO at the oxygen-substitutional site. Moreover, these C- and N-doped CaO show the room-temperature ferromagnetism with half-metallic density of states.

引用

页码：L934 / L936

页数：3

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