Interface alloying effects in the magnetic properties of Fe nanoislands capped with different materials
Interface alloying effects in the magnetic properties of Fe nanoislands capped with different materials
复制标题
不同材料覆盖的 Fe 纳米岛磁性能中的界面合金化效应
DOI：
10.1103/physrevb.78.104403
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发表时间：
2008
影响因子：
3.7
通讯作者：
A. Cebollada
中科院分区：
文献类型：
--
作者：
Y. Huttel;E. Navarro;N. Telling;G. Laan;F. Pigazo;F. Palomares;C. Quintana;E. Román;G. Armelles;A. Cebollada
我们发现，Fe纳米岛覆盖有Al，Pd和Pt保护层，包括在与覆盖层的界面处的合金，这解释了先前已知的覆盖层依赖于粒子间的磁耦合。例如，振动样品磁力测定结果证明在15 mT的磁场下测量的磁化强度降低，这在Al封盖的情况下更大，并且这是由于存在磁死界面合金。这种减少也观察到在原子水平上使用X-射线磁性圆二色性测量，示出了盖层依赖的Fe磁矩减少，这是类似的Pd和Pt盖帽，和更强的Al盖帽。作为覆盖层的函数的磁性能的趋势被解释在光的X-射线光电子能谱的结果，证据的Fe纳米岛和覆盖层之间的界面处的合金的形成。目前的结果突出了界面合金化在降维系统的强烈影响。特别是，它示出的磁性强烈影响在原子和宏观水平。
We show that Fe nanoislands capped with Al, Pd, and Pt protecting layers include an alloy at the interface with the capping layer, which explains the previously known capping layer dependence on the interparticle magnetic coupling. Vibrating sample magnetometry results, for instance, are evidencing a reduction in the magnetization measured under a magnetic field of 15 mT, which is larger in the case of the Al capping and which is due to the presence of a magnetically dead interface alloy. This reduction is also observed at the atomic level using x-ray magnetic circular dichroism measurements, showing a capping layer dependence of the Fe magnetic-moment reduction that is similar for the Pd and Pt capping, and stronger for the Al capping. The trend in the magnetic properties as a function of the capping layer is explained in the light of x-ray photoemission spectroscopy results that evidence the formation of alloys at the interface between the Fe nanoislands and the capping layers. The present results highlight the strong influence of interface alloying in systems of reduced dimensionality. In particular, it is shown that the magnetic properties are strongly affected at both the atomic and macroscopic level.
超薄铁/铝多层薄膜的穆斯堡尔研究
DOI：
--
发表时间：
2007
期刊：
Phys.Rev.B 75
影响因子：
--
作者：
D.Kaptas;J.Balogh;T.Kemeny;L.F.Kiss;L.Bujdoso;A.Kovacs;A. Hirata;and I. Vincze
通讯作者：
and I. Vincze