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Magnetic anisotropy manipulation and interfacial coupling in Sm3Fe5O12 films and CoFe/Sm3Fe5O12 heterostructures

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【作者】 沈磊； 武冠杰； 孙韬； 孟智； 周春； 刘文怡； 邱康； 马宗伟； 黄浩亮； 陆亚林； 张宗芝； 盛志高；

【Author】 Lei Shen;Guanjie Wu;Tao Sun;Zhi Meng;Chun Zhou;Wenyi Liu;Kang Qiu;Zongwei Ma;Haoliang Huang;Yalin Lu;Zongzhi Zhang;Zhigao Sheng;Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,HFIPS,Chinese Academy of Sciences(CAS);University of Science and Technology of China;Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center and Key Laboratory of Micro and Nano Photonic Structures (MOE),Department of Optical Science and Engineering,Fudan University;Anhui Laboratory of Advanced Photon Science and Technology,Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China;Key Laboratory of Photovoltaic and Energy Conservation Materials,Chinese Academy of Sciences;

【通讯作者】 张宗芝;盛志高;

【机构】 Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,HFIPS,Chinese Academy of Sciences(CAS)； University of Science and Technology of China； Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center and Key Laboratory of Micro and Nano Photonic Structures (MOE),Department of Optical Science and Engineering,Fudan University； Anhui Laboratory of Advanced Photon Science and Technology,Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China； Key Laboratory of Photovoltaic and Energy Conservation Materials,Chinese Academy of Sciences；

【摘要】 The magnetic anisotropy manipulation in the Sm3Fe5O12（SmIG） films and its effect on the interfacial spin coupling in the CoFe/SmIG heterostructures were studied carefully. By switching the orientation of the Gd3Ga5O12 substrates from（111） to（001）, the magnetic anisotropy of obtained SmIG films shifts from in-plane to out-of-plane. Similar results can also be obtained in the films on Gd3Ga5O12 substrates, which identifies the universality of such orientation-induced magnetic anisotropy switching. Additionally, the interfacial spin coupling and magnetic anisotropy switching effect on the spin wave in CoFe/SmIG magnetic heterojunctions have also been explored by utilizing the time-resolved magneto–optical Kerr effect technique. It is intriguing to find that both the frequency and effective damping factor of spin precession in CoFe/SmIG heterojunctions can be manipulated by the magnetic anisotropy switching of SmIG films. These findings not only provide a route for the perpendicular magnetic anisotropy acquisition but also give a further path for spin manipulation in magnetic films and heterojunctions.

【Abstract】 The magnetic anisotropy manipulation in the Sm3Fe5O12（SmIG） films and its effect on the interfacial spin coupling in the CoFe/SmIG heterostructures were studied carefully. By switching the orientation of the Gd3Ga5O12 substrates from（111） to（001）, the magnetic anisotropy of obtained SmIG films shifts from in-plane to out-of-plane. Similar results can also be obtained in the films on Gd3Ga5O12 substrates, which identifies the universality of such orientation-induced magnetic anisotropy switching. Additionally, the interfacial spin coupling and magnetic anisotropy switching effect on the spin wave in CoFe/SmIG magnetic heterojunctions have also been explored by utilizing the time-resolved magneto–optical Kerr effect technique. It is intriguing to find that both the frequency and effective damping factor of spin precession in CoFe/SmIG heterojunctions can be manipulated by the magnetic anisotropy switching of SmIG films. These findings not only provide a route for the perpendicular magnetic anisotropy acquisition but also give a further path for spin manipulation in magnetic films and heterojunctions.

【关键词】 perpendicular magnetic anisotropy； Sm3Fe5O12 films； interfacial spin coupling； CoFe/Sm3Fe5O12 heterojunction；
【Key words】 perpendicular magnetic anisotropy； Sm3Fe5O12 films； interfacial spin coupling； CoFe/Sm3Fe5O12 heterojunction；
【基金】 Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFA0303603 and 2016YFA0401803);the National Natural Science Foundation of China (Grant Nos. U2032218, 11574316, 11874120, 61805256, and 11904367);the Plan for Major Provincial Science&Technology Project (Grant No. 202003a05020018);the Key Research Program of Frontier Sciences,CAS (Grant No. QYZDB-SSW-SLH011)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2021年12期
  • 【分类号】O469
  • 【下载频次】31
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