Bismuth doping enhanced tunability of strain-controlled magnetic anisotropy in epitaxial Y_(3)Fe_(5)O_(12)(111) films  

作　　者：贾云鹏 梁正国 潘昊霖 王庆 吕崎鸣 严轶非 金锋 侯达之 王凌飞 吴文彬 Yunpeng Jia;Zhengguo Liang;Haolin Pan;Qing Wang;Qiming Lv;Yifei Yan;Feng Jin;Dazhi Hou;Lingfei Wang;Wenbin Wu(Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China;Department of Physics,University of Science and Technology of China,Hefei 230026,China;Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,HFIPS,Anhui,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[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

出　　处：《Chinese Physics B》2023年第2期27-33,共7页中国物理B（英文版）

基　　金：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);Hefei Science Center CAS Foundation (Grant No. 2021HSC-UE010);partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication;the magnetic characterizations were carried out in the Instruments Center for Physical Science, USTC。

摘　　要：Y_(3)Fe_(5)O_(12)(YIG) and Bi Y_(3)Fe_(5)O_(12)(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.

关 键 词：yttrium iron garnet strain engineering DOPING magnetic anisotropy 

分 类 号：O469[理学—凝聚态物理]