Effect of demagnetization factors on spin current transport
Effect of demagnetization factors on spin current transport
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DOI：
10.1103/physrevb.102.174426
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发表时间：
2020-11
影响因子：
3.7
通讯作者：
Po-Hsun Wu;Ying-Ting Chan;T. Hung;Yi-Hui Zhang;D. Qu;T. Chuang;C. Chien;Ssu-Yen Huang
中科院分区：
文献类型：
--
作者：
Po-Hsun Wu;Ying-Ting Chan;T. Hung;Yi-Hui Zhang;D. Qu;T. Chuang;C. Chien;Ssu-Yen Huang
与形状各向异性相关的退磁场来源于磁性材料磁化产生的磁场。形状和退磁效应必须被认为是磁场存在下磁性物体的特征。在本研究中，我们证明了退磁场对Pt/YIG中自旋电流输运的强烈影响，包括自旋塞贝克效应、自旋霍尔效应、自旋霍尔磁电阻和平面霍尔电阻。计算的有效退磁因子与自旋相关的电输运和热输运的厚度和宽度相关的异常平台行为以及磁光测量密切相关。此外，我们证明了高原的宽度体现在YIG样品的形状。此外，通过磁力显微镜，我们直接看到了90°突然磁旋转时磁畴的演变，我们进一步证实了角相关平面霍尔效应中的90°电阻相移。
The demagnetizing field associated with shape anisotropy originates from the magnetic field generated through magnetization of magnetic materials. The shape and demagnetizing effects must be considered as characteristics of a magnetic object in the presence of a magnetic field. In this study, we demonstrated the strong influence of the demagnetizing field on the spin current transports in Pt/YIG, including the spin Seebeck effect, spin Hall effect, spin Hall magnetoresistance, and planar Hall resistance. The calculated effective demagnetizing factors were closely related to the thickness- and width-dependent anomalous plateau behaviors of the spin-dependent electrical and thermal transports as well as magneto-optical measurements. Moreover, we demonstrated that the width of the plateau manifested from the shape of the YIG sample. Furthermore, through magnetic force microscopy, we directly visualized the evolution of the magnetic domains with an abrupt 90° magnetic rotation, which we further corroborated by the 90° resistance phase shift in the angular-dependent planar Hall effect.