Magnetic dead layers induced by strain at fct Fe/Rh(001) interface
Magnetic dead layers induced by strain at fct Fe/Rh(001) interface
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DOI：
10.1143/jpsj.73.2550
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发表时间：
2004-09
影响因子：
1.7
通讯作者：
K. Hayashi;M. Sawada;H. Yamagami;A. Kimura;A. Kakizaki
中科院分区：
文献类型：
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作者：
K. Hayashi;M. Sawada;H. Yamagami;A. Kimura;A. Kakizaki
研究了室温下生长在Rh（001）表面的面心四面体Fe（fct）薄膜的磁性。带结构计算表明，Rh（001）表面上的fct Fe的稳定磁相为铁磁（FM），这与我们以前对四个单层（ML）Fe膜的角分辨光电子能谱和自旋角分辨光电子能谱（SARPES）所得到的结论一致[K. Hayashi等人：Phys. Rev. B 64（2001）054417]。3 ML Fe/Rh（001）的SARPES谱也证实了fct Fe的这种磁相。另一方面，由SARPES估计的居里温度和由软X射线磁性圆二色性实验估计的局部磁矩的厚度依赖性表明，低于2 ML的Fe膜不是FM，即，它们是磁性死层。我们认为这些磁死层是由Fe/Rh（001）界面处的大应变引起的。
We have studied magnetic properties of face-centered-tetragonal (fct) Fe thin films grown at room temperature on the Rh(001) surface. Band structure calculations show that the stable magnetic phase of fct Fe on the Rh(001) surface is ferromagnetic (FM), which agrees with our previous conclusion obtained by angle-resolved photoelectron spectroscopy and spin- and angle-resolved photoelectron spectroscopy (SARPES) of the four monolayers (ML) Fe film [K. Hayashi et al. : Phys. Rev. B 64 (2001) 054417]. This magnetic phase of fct Fe is also confirmed by the SARPES spectra of 3 ML Fe/Rh(001). On the other hand the thickness dependence of the Curie temperature estimated by SARPES and of local magnetic moment by soft X-ray magnetic circular dichroism experiments show that the Fe films below 2 ML are not FM, i.e., they are magnetic dead layers. We conclude that these magnetic dead layers are caused by a large strain at the Fe/Rh(001) interface.