中国物理B ›› 2024, Vol. 33 ›› Issue (10): 107505-107505.doi: 10.1088/1674-1056/ad6b84

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Low Gilbert damping in Bi/In-doped YIG thin films with giant Faraday effect

Jin Zhan(湛劲)1, Yi Wang(王一)1, Xianjie Wang(王先杰)1,5,6,†, Hanxu Zhang(张晗旭)1, Senyin Zhu(朱森寅)1, Lingli Zhang(张伶莉)1, Lingling Tao(陶玲玲)1, Yu Sui(隋郁)1, Wenqing He(何文卿)2, Caihua Wan(万蔡华)2, Xiufeng Han(韩秀峰)2, V. I. Belotelov3, and Bo Song(宋波)4,5,6,‡   

  1. 1 School of Physics, Harbin Institute of Technology, Harbin 150001, China;
    2 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Russian Quantum Center, Moscow 119991, Russia;
    4 National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China;
    5 Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450046, China;
    6 Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2024-05-21 修回日期:2024-07-15 接受日期:2024-08-06 发布日期:2024-09-19
  • 通讯作者: Xianjie Wang, Bo Song E-mail:wangxianjie@hit.edu.cn;songbo@hit.edu.cn
  • 基金资助:
    This work was supported by the National Key Research and Development Program of China (Grant No. 2023YFE0201000), the National Science Fund for Distinguished Young Scholars (Grant No. 52225201), the National Natural Science Foundation of China (Grant Nos. 52372004 and 52072085), the Fundamental Research Funds for the Central Universities (Grant Nos. 2023FRFK06001 and HIT.BRET.2022001), and Heilongjiang Touyan Innovation Team Program.

Low Gilbert damping in Bi/In-doped YIG thin films with giant Faraday effect

Jin Zhan(湛劲)1, Yi Wang(王一)1, Xianjie Wang(王先杰)1,5,6,†, Hanxu Zhang(张晗旭)1, Senyin Zhu(朱森寅)1, Lingli Zhang(张伶莉)1, Lingling Tao(陶玲玲)1, Yu Sui(隋郁)1, Wenqing He(何文卿)2, Caihua Wan(万蔡华)2, Xiufeng Han(韩秀峰)2, V. I. Belotelov3, and Bo Song(宋波)4,5,6,‡   

  1. 1 School of Physics, Harbin Institute of Technology, Harbin 150001, China;
    2 Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    3 Russian Quantum Center, Moscow 119991, Russia;
    4 National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China;
    5 Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450046, China;
    6 Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology, Harbin 150001, China
  • Received:2024-05-21 Revised:2024-07-15 Accepted:2024-08-06 Published:2024-09-19
  • Contact: Xianjie Wang, Bo Song E-mail:wangxianjie@hit.edu.cn;songbo@hit.edu.cn
  • Supported by:
    This work was supported by the National Key Research and Development Program of China (Grant No. 2023YFE0201000), the National Science Fund for Distinguished Young Scholars (Grant No. 52225201), the National Natural Science Foundation of China (Grant Nos. 52372004 and 52072085), the Fundamental Research Funds for the Central Universities (Grant Nos. 2023FRFK06001 and HIT.BRET.2022001), and Heilongjiang Touyan Innovation Team Program.

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摘要： Magnetic films with low Gilbert damping are crucial for magnonic devices, which provide a promising platform for realizing ultralow-energy devices. In this study, low Gilbert damping and coercive field were observed in Bi/In-doped yttrium iron garnet (BiIn:YIG) thin films. The BiIn:YIG (444) films were deposited onto different substrates using pulsed laser deposition. Low coercivity ($<$1 Oe) with saturation magnetization of 125.09 emu/cc was achieved along the in-plane direction of BiIn:YIG film. The values of Gilbert damping and inhomogeneous broadening of ferromagnetic resonance in BiIn:YIG films were obtained to be as low as $4.05\times 10^{-4}$ and 5.62 Oe, respectively. In addition to low damping, the giant Faraday rotation angles (up to $2.9\times 10^{4}$ deg/cm) were also observed in the BiIn:YIG film. By modifying the magnetic structure and coupling effect between Bi$^{3+}$ and Fe$^{3+}$ of Bi:YIG, doped In$^{3+}$ plays a key role on variation of the magnetic properties. The low damping and giant Faraday effect made the BiIn:YIG film an appealing candidate for magnonic and magneto-optical devices.

关键词: magnonic device, Gilbert damping, Faraday effect

Abstract: Magnetic films with low Gilbert damping are crucial for magnonic devices, which provide a promising platform for realizing ultralow-energy devices. In this study, low Gilbert damping and coercive field were observed in Bi/In-doped yttrium iron garnet (BiIn:YIG) thin films. The BiIn:YIG (444) films were deposited onto different substrates using pulsed laser deposition. Low coercivity ($<$1 Oe) with saturation magnetization of 125.09 emu/cc was achieved along the in-plane direction of BiIn:YIG film. The values of Gilbert damping and inhomogeneous broadening of ferromagnetic resonance in BiIn:YIG films were obtained to be as low as $4.05\times 10^{-4}$ and 5.62 Oe, respectively. In addition to low damping, the giant Faraday rotation angles (up to $2.9\times 10^{4}$ deg/cm) were also observed in the BiIn:YIG film. By modifying the magnetic structure and coupling effect between Bi$^{3+}$ and Fe$^{3+}$ of Bi:YIG, doped In$^{3+}$ plays a key role on variation of the magnetic properties. The low damping and giant Faraday effect made the BiIn:YIG film an appealing candidate for magnonic and magneto-optical devices.

Key words: magnonic device, Gilbert damping, Faraday effect

中图分类号:  (Magnetic properties of monolayers and thin films)

  • 75.70.Ak
78.20.Ls (Magneto-optical effects) 75.50.Gg (Ferrimagnetics) 75.75.-c (Magnetic properties of nanostructures)