Room-temperature ferromagnetism in zinc-blende and deformed CrAs thin films

被引：28

作者：

Bi, JF

Zhao, JH

Deng, JJ

Zheng, YH

Li, SS

Wu, XG

Jia, QJ

机构：

[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Beijing Synchroton Radiat Facil, Inst High Energy Phys, Beijing 100039, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 14期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2193430

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We try to clarify the controversy about the origin of room-temperature ferromagnetism in a CrAs compound. Two kinds of CrAs thin films were grown on GaAs by molecular-beam epitaxy. Structural analyses confirm that the as-grown CrAs film is a pure zinc-blende phase. Magnetic measurements suggest that room-temperature ferromagnetism exists in zinc-blende CrAs. In contrast, the CrAs film turns into a mixture of zinc-blende and deformed CrAs after annealing. A ferromagnetic signal measured at room temperature demonstrates that zinc-blende CrAs remains room-temperature ferromagnetism even when it is partly deformed into a non-zinc-blende phase. (c) 2006 American Institute of Physics.

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