Static and dynamic magnetic properties of FeMn/Pt multilayers

被引:5
作者
Luo, Ziyan [1 ]
Yang, Yumeng [1 ]
Xu, Yanjun [1 ,2 ]
Zhang, Mengzhen [3 ]
Xu, Baoxi [2 ]
Chen, Jingsheng [3 ]
Wu, Yihong [1 ]
机构
[1] Natl Univ Singapore, Dept Elect & Comp Engn, 4 Engn Dr 3, Singapore 117583, Singapore
[2] ASTAR, Data Storage Inst, 2 Fusionopolis Way,08-01 Innovis, Singapore 138634, Singapore
[3] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore
基金
新加坡国家研究基金会;
关键词
MAGNETOOPTICAL RECORDING MATERIALS; FERROMAGNETIC-RESONANCE; CO/PT MULTILAYERS; SURFACE MAGNETISM; ULTRATHIN; FILMS;
D O I
10.1063/1.4985119
中图分类号
O59 [应用物理学];
学科分类号
摘要
Recently, we have demonstrated the presence of spin-orbit torque in FeMn/Pt multilayers which, in combination with the anisotropy field, is able to rotate its magnetization consecutively from 0 degrees to 360 degrees without any external field. Here, we report on an investigation of the static and dynamic magnetic properties of FeMn/Pt multilayers using the combined techniques of magnetometry, ferromagnetic resonance, inverse spin Hall effect, and spin Hall magnetoresistance measurements. The FeMn/Pt multilayer was found to exhibit ferromagnetic properties, and its temperature dependence of saturation magnetization can be fitted well using a phenomenological model by including a finite distribution in Curie temperature due to subtle thickness variations across the multilayer samples. The non-uniformity in static magnetic properties is also manifested in the ferromagnetic resonance spectra, which typically exhibit a broad resonance peak. A damping parameter of around 0.106 is derived from the frequency dependence of ferromagnetic resonance linewidth, which is comparable to the reported values for other types of Pt-based multilayers. Clear inverse spin Hall signals and spin Hall magnetoresistance have been observed in all samples below the Curie temperature, which corroborate the strong spin-orbit torque effect observed previously. Published by AIP Publishing.
引用
收藏
页数:10
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