Room-temperature ferromagnetism in zinc-blende and deformed CrAs thin films
Room-temperature ferromagnetism in zinc-blende and deformed CrAs thin films
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DOI：
10.1063/1.2193430
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发表时间：
2006-04
影响因子：
4
通讯作者：
J. Bi;Junqing Zhao;J. Deng;Yuanliao Zheng;S. Li;X. Wu;Q. Jia
中科院分区：
文献类型：
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作者：
J. Bi;Junqing Zhao;J. Deng;Yuanliao Zheng;S. Li;X. Wu;Q. Jia
我们试图澄清的争议的起源在室温铁磁性的CrAs化合物。用分子束外延技术在GaAs衬底上生长了两种CrAs薄膜。结构分析证实，生长的CrAs薄膜是一个纯锌锌相。磁性测量表明，室温铁磁性存在于锌-铬砷。退火后CrAs薄膜变成了锌掺杂和变形CrAs的混合物。在室温下测量的铁磁信号表明，锌-CrAs保持室温铁磁性，即使它是部分变形成非锌-CrAs相。
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.