Abnormal spin-pumping effect at Pt/NiFe interface by an oxidation of ferromagnet

被引：5
作者：
Kim, Sang-Il [1 ]
Seo, Min-Su [1 ]
Seo, Jung-Hye [1 ]
Yun, Hyung Joong [1 ]
Lee, Jouhahn [1 ]
Choi, Yeon Suk [1 ]
Park, Seung-Young [1 ]
机构：
[1] Korea Basic Sci Inst, Div Mat Sci, Taejon 305806, South Korea
来源：
CURRENT APPLIED PHYSICS | 2014年 / 14卷 / 12期
基金：
新加坡国家研究基金会;
关键词：
Ferromagnetic resonance; Inverse spin Hall effect; X-ray photoelectron spectroscopy; Spin pumping;
D O I：
10.1016/j.cap.2014.10.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Inverse Spin Hall Effect (ISHE) voltage induced by spin-pumping was measured in Pt/[nonoxidized or oxidized NiFe] samples. The spectrum shape of the DC voltage signal was well-reproduced by simple Lorentzian functions, which were consistent with the prediction of ISHE in Pt/nonoxidized NiFe sample. On the other hand, the voltage signal from the Pt/oxidized NiFe was significantly decreased in accordance with abnormal ferromagnetic resonance (FMR) behavior. The origin of the ISHE voltage degradation was investigated by the FMR spectrum and X-ray photoelectron spectroscopy (XPS) analyses. The spin-pumping was suppressed by the oxidation of NiFe layer and deficient Pt/NiFe interface. The well-defined ferromagnet and clear interface with a normal spin mixing conductance were experimentally demonstrated to be reasonable spin-pumping. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：1743 / 1747
页数：5
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