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Bismuth doping enhanced tunability of strain-controlled magnetic anisotropy in epitaxial Y3Fe5O12(111) films |
| Yunpeng Jia(贾云鹏)1, Zhengguo Liang(梁正国)1, Haolin Pan(潘昊霖)1, Qing Wang(王庆)1, Qiming Lv(吕崎鸣)1, Yifei Yan(严轶非)2, Feng Jin(金锋)1, Dazhi Hou(侯达之)1,2, Lingfei Wang(王凌飞)1,2,†, and Wenbin Wu(吴文彬)1,2,3,‡ |
1 Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China;
2 Department of Physics, University of Science and Technology of China, Hefei 230026, China;
3 Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, HFIPS, Anhui, Chinese Academy of Sciences, Hefei 230031, China |
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Abstract Y3Fe5O12 (YIG) and BiY2Fe5O12 (Bi:YIG) films were epitaxially grown on a series of (111)-oriented garnet substrates using pulsed laser deposition. Structural and ferromagnetic resonance characterizations demonstrated the high epitaxial quality, extremely low magnetic loss and coherent strain state in these films. Using these epitaxial films as model systems, we systematically investigated the evolution of magnetic anisotropy (MA) with epitaxial strain and chemical doping. For both the YIG and Bi:YIG films, the compressive strain tends to align the magnetic moment in the film plane while the tensile strain can compete with the demagnetization effect and stabilize perpendicular MA. We found that the strain-induced lattice elongation/compression along the out-of-plane [111] axis is the key parameter that determines the MA. More importantly, the strain-induced tunability of MA can be enhanced significantly by Bi doping; meanwhile, the ultralow damping feature persists. We clarified that the cooperation between strain and chemical doping could realize an effective control of MA in garnet-type ferrites, which is essential for spintronic applications.
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Received: 28 March 2022
Revised: 13 April 2022
Accepted manuscript online: 18 April 2022
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PACS:
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75.30.Gw
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(Magnetic anisotropy)
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75.50.Gg
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(Ferrimagnetics)
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75.47.Lx
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(Magnetic oxides)
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75.75.-c
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(Magnetic properties of nanostructures)
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| Fund: Project supported by the National Basic Research Program of China (Grant No. 2020YFA0309100), the National Natural Science Foundation of China (Grant Nos. 12074365 and U2032218), the Fundamental Research Funds for the Central Universities (Grant Nos. WK9990000108, WK9990000102, and WK2030000035), and Hefei Science Center CAS Foundation (Grant No. 2021HSC-UE010). The sample fabrication was partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication and the magnetic characterizations were carried out in the Instruments Center for Physical Science, USTC. |
Corresponding Authors:
Lingfei Wang, Wenbin Wu
E-mail: wanglf@ustc.edu.cn;wuwb@ustc.edu.cn
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Cite this article:
Yunpeng Jia(贾云鹏), Zhengguo Liang(梁正国), Haolin Pan(潘昊霖), Qing Wang(王庆), Qiming Lv(吕崎鸣), Yifei Yan(严轶非), Feng Jin(金锋), Dazhi Hou(侯达之), Lingfei Wang(王凌飞), and Wenbin Wu(吴文彬) Bismuth doping enhanced tunability of strain-controlled magnetic anisotropy in epitaxial Y3Fe5O12(111) films 2023 Chin. Phys. B 32 027501
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