Coercivity mechanism of La-Nd-Fe-B films with Y spacer layer  

作　　者：马俊 赵晓天 刘伟 李阳 刘龙 赵新国 张志东 Jun Ma;Xiao-Tian Zhao;Wei Liu;Yang Li;Long Liu;Xin-Guo Zhao;Zhi-Dong Zhang(Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China)

机构地区：[1]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China

出　　处：《Chinese Physics B》2024年第3期138-143,共6页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2021YFB3500303);the National Natural Science Foundation of China(Grant Nos.52031014 and 51971219).

摘　　要：The effect of the Y spacer layer on the phase composition,coercivity,and magnetization reversal processes of La-Nd-Fe-B films has been investigated.The addition of a 10 nm Y spacer layer increases the coercivity of the film to 1.36 T at 300 K and remains 0.938 T at 380 K.As the thickness of the Y spacer layer increases,Y participates in the formation of the main phase in the film,and further regulates the formation of La-B phases.The results of the first-order reversal curve(FORC)and micromagnetic fitting show that the coercivity of all the films is dominated by nucleation mechanism.The c-axis preferred orientation,good magnetic microstructure parameters and the largest dipole interaction enhance the coercivity.Therefore,the introduction of the Y spacer layer can be an effective way to improve the coercivity of La-Nd-Fe-B film over a wide temperature range of 150 K-380 K.

关 键 词：La-Nd-(Y)-Fe-B films magnetization reversal mechanisms COERCIVITY MULTILAYERS 

分 类 号：O484[理学—固体物理]