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

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【作者】湛劲；王一；王先杰；张晗旭；朱森寅；张伶莉；陶玲玲；隋郁；何文卿；万蔡华；韩秀峰； V.I.Belotelov；宋波；

【Author】 Jin Zhan;Yi Wang;Xianjie Wang;Hanxu Zhang;Senyin Zhu;Lingli Zhang;Lingling Tao;Yu Sui;Wenqing He;Caihua Wan;Xiufeng Han;V.I.Belotelov;Bo Song;School of Physics, Harbin Institute of Technology;Zhengzhou Research Institute, Harbin Institute of Technology;Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology;Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences;Russian Quantum Center;National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology;

【通讯作者】王先杰;宋波;

【机构】 School of Physics, Harbin Institute of Technology； Zhengzhou Research Institute, Harbin Institute of Technology； Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology； Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences； Russian Quantum Center； National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology；

【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 × 10^-4 and 5.62 Oe,respectively.In addition to low damping,the giant Faraday rotation angles（up to 2.9 × 10⁴ deg/cm） were also observed in the BiIn:YIG film.By modifying the magnetic structure and coupling effect between Bi³⁺and Fe³⁺of Bi:YIG,doped In³⁺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.更多还原

【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 × 10^-4 and 5.62 Oe,respectively.In addition to low damping,the giant Faraday rotation angles（up to 2.9 × 10⁴ deg/cm） were also observed in the BiIn:YIG film.By modifying the magnetic structure and coupling effect between Bi³⁺and Fe³⁺of Bi:YIG,doped In³⁺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.更多还原

【关键词】 magnonic device； Gilbert damping； Faraday effect；
【Key words】 magnonic device； Gilbert damping； Faraday effect；

【基金】 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. 52372004and 52072085);the Fundamental Research Funds for the Central Universities (Grant Nos. 2023FRFK06001 and HIT.BRET.2022001);Heilongjiang Touyan Innovation Team Program

【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2024年10期

【分类号】O469
【下载频次】4

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