Mössbauer effect study of magnetism and structure of fcc-like Fe(001) films on Cu(001).
Mössbauer effect study of magnetism and structure of fcc-like Fe(001) films on Cu(001).
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Cu(001) 上类面心立方 Fe(001) 薄膜的磁性和结构的穆斯堡尔效应研究。
DOI：
10.1103/physrevlett.74.3053
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发表时间：
1995
影响因子：
8.6
通讯作者：
Brand
中科院分区：
文献类型：
--
作者：
Ellerbrock;Fuest;Schatz;Keune;Brand
通过转换电子Mössbauer能谱在300 K下在Cu（001）上超高压外生的3层和7层单层厚Fe薄膜中原位观察到磁和电的超细相互作用，为从具有各向异性扩展fcc （fft -like）结构c/a bbb1的高矩铁磁状态到低矩反铁磁各向同性fcc状态的厚度依赖转变提供了微观证据。然而，在类似的薄膜中，在~ 90k生长并退火到300k，这种高矩的类事实相在两种厚度下都存在。我们得出结论，高矩铁磁态只存在于类事实铁中，而不存在于fcc铁中。
Magnetic and electric hyperfine interactions observed in situ by conversion-electron Mössbauer spectroscopy in 3 and 7 monolayers thick Fe films grown epitaxially in UHV on Cu (001) at 300 K provide microscopic evidence for a thickness-dependent transition from a high-moment ferromagnetic state with an anisotropically expanded fcc (fct-like) structure c/a> 1 to a low-moment antiferromagnetic isotropic fcc state. In similar films grown at∼ 90 K and annealed to 300 K, however, this high-moment fct-like phase was found to exist at both thicknesses. We conclude that the high-moment ferromagnetic state can exist in fct-like Fe only, but not in fcc Fe.