中国物理B ›› 2018, Vol. 27 ›› Issue (11): 117201-117201.doi: 10.1088/1674-1056/27/11/117201

所属专题： SPECIAL TOPIC — 80th Anniversary of Northwestern Polytechnical University (NPU)

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Spin Seebeck effect and spin Hall magnetoresistance in the Pt/Y3Fe5O12 heterostructure under laser-heating

Shuanhu Wang(王拴虎), Gang Li(李刚), Jianyuan Wang(王建元), Yingyi Tian(田颖异), Hongrui Zhang(张洪瑞), Lvkuan Zou(邹吕宽), Jirong Sun(孙继荣), Kexin Jin(金克新)   

  1. 1 Shaanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University, Xi'an 710072, China;
    2 Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 High Magnetic Field Laboratory, Chinese Academy of Science, Hefei 230031, China
  • 收稿日期:2018-06-21 修回日期:2018-07-25 出版日期:2018-11-05 发布日期:2018-11-05
  • 通讯作者: Shuanhu Wang, Kexin Jin E-mail:shwang2015@nwpu.edu.cn;jinkx@nwpu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11604265, 51471134, 51572222, and 11704386) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 3102018zy044 and 3102017jc01001).

Spin Seebeck effect and spin Hall magnetoresistance in the Pt/Y3Fe5O12 heterostructure under laser-heating

Shuanhu Wang(王拴虎)1, Gang Li(李刚)2, Jianyuan Wang(王建元)1, Yingyi Tian(田颖异)1, Hongrui Zhang(张洪瑞)2, Lvkuan Zou(邹吕宽)3, Jirong Sun(孙继荣)2, Kexin Jin(金克新)1   

  1. 1 Shaanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University, Xi'an 710072, China;
    2 Beijing National Laboratory for Condensed Matter and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 High Magnetic Field Laboratory, Chinese Academy of Science, Hefei 230031, China
  • Received:2018-06-21 Revised:2018-07-25 Online:2018-11-05 Published:2018-11-05
  • Contact: Shuanhu Wang, Kexin Jin E-mail:shwang2015@nwpu.edu.cn;jinkx@nwpu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11604265, 51471134, 51572222, and 11704386) and the Fundamental Research Funds for the Central Universities, China (Grant Nos. 3102018zy044 and 3102017jc01001).

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摘要：

In the previous study of longitudinal spin Seebeck effect (LSSE), the thermal gradient was often generated by inserting the sample between the cool bath and the hot bath. For practical use, this method is too cumbersome to be easily integrated into modern electrical circuits. Since the laser can be easily focused into a small region, it will be more convenient and friendly to the integrated circuit. In this paper, we systematically investigate the LSSE and spin Hall magnetoresistance (SMR) of the Pt/Y3Fe5O12 heterostructure under focused laser-heating. We find that the extremely large voltage of inverse spin Hall effect (VISHE) can be obtained by reducing the diameter of laser or increasing the number of light spots. Meanwhile, even under the illumination of the ultraviolet light which will excite the electron from the valence band to the conduction band in yttrium iron garnet (YIG), the magnitude of SMR is nearly constant. It indicates that the spin transport behavior of the adjacent Pt is independent of the electron configuration of YIG. The laser-heating method to generate LSSE will be very promising for modern integrated electronic circuits and will promote the application of spin caloritronics in practice.

关键词: spin Seebeck effect, spin Hall magnetoresistance, laser heating, yttrium iron garnet

Abstract:

In the previous study of longitudinal spin Seebeck effect (LSSE), the thermal gradient was often generated by inserting the sample between the cool bath and the hot bath. For practical use, this method is too cumbersome to be easily integrated into modern electrical circuits. Since the laser can be easily focused into a small region, it will be more convenient and friendly to the integrated circuit. In this paper, we systematically investigate the LSSE and spin Hall magnetoresistance (SMR) of the Pt/Y3Fe5O12 heterostructure under focused laser-heating. We find that the extremely large voltage of inverse spin Hall effect (VISHE) can be obtained by reducing the diameter of laser or increasing the number of light spots. Meanwhile, even under the illumination of the ultraviolet light which will excite the electron from the valence band to the conduction band in yttrium iron garnet (YIG), the magnitude of SMR is nearly constant. It indicates that the spin transport behavior of the adjacent Pt is independent of the electron configuration of YIG. The laser-heating method to generate LSSE will be very promising for modern integrated electronic circuits and will promote the application of spin caloritronics in practice.

Key words: spin Seebeck effect, spin Hall magnetoresistance, laser heating, yttrium iron garnet

中图分类号:  (Spin polarized transport in metals)

  • 72.25.Ba
73.40.-c (Electronic transport in interface structures) 72.10.Di (Scattering by phonons, magnons, and other nonlocalized excitations) 75.50.Lk (Spin glasses and other random magnets)