Surface influenced magnetostructural transition in FeRh films
Surface influenced magnetostructural transition in FeRh films
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DOI：
10.1063/1.3265921
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发表时间：
2009-11-30
影响因子：
4
通讯作者：
Arena, D. A.
中科院分区：
文献类型：
--
作者：
Kim, J. W.;Ryan, P. J.;Arena, D. A.
用掠入射X射线散射研究了外延FeRh薄膜的反铁磁-铁磁结构转变过程中的表面结构效应。测量的薄膜晶格参数和X-射线入射角的变化允许观察范围从几个纳米的总的通过厚度的膜的尺度上的过渡字符。面外晶格测量证实，铁磁相成核从表面在加热过程中，并保留在表面的转变温度以下，在冷却过程中。这些结果表明，表面应变消除促进铁磁相的成核。
Surface structural effects accompanying the antiferromagnetic-ferromagnetic magnetostructral transition of epitaxial FeRh thin films were investigated by grazing incidence x-ray scattering. Measurement of the film lattice parameters and variation of x-ray incident angles allow observation of the transition character on scales ranging from a few nm to the total through-thickness of the film. Out-of-plane lattice measurements confirm that the ferromagnetic phase nucleates from the surface during the heating process and is retained at the surface below the transition temperature during the cooling process. These results suggest that surface strain relief fosters nucleation of the ferromagnetic phase.