Demagnetizing factors in patterned CoNiFe films with rectangular elements  

作　　者：章羽 张栋 王昱坤 尹玉莉 黄兆聪 罗琛 翟亚 

机构地区：[1]Department of Physics,Southeast University [2]School of Physics Science and Information Engineering,Liaocheng University

出　　处：《Chinese Physics B》2013年第5期421-424,共4页中国物理B（英文版）

基　　金：Project supported by the Postgraduates Innovation Program of Jiangsu Province, China (Grant No. CXZZ12-0086);the National Natural Science Foundation of China (Grant No. 11074034);the National Basic Research Program of China (Grant No. 2010CB923404);the National Laboratory of Solid State Microstructures at Nanjing University and Southeast University, China

摘　　要：CoNiFe patterned films with rectangular elements, all 600-nm wide but of different lengths, were fabricated and inves- tigated by ferromagnetic resonance experiment and micromagnetic simulation. An in-plane magnetic uniaxial anisotropy was exhibited, and its value increases with the increase of the aspect ratio of the elements, which was fitted by the model, including a quasi-ellipsoid demagnetizing field and a non-uniform demagnetizing field. The relative importance of the non- uniform demagnetizing field decreased from 0.26 to 0.16 with the increase of the length-width aspect ratio of the patterned element from 1.5 to 10. The demagnetizing factors in the three principal axes were determined from the experimental data of ferromagnetic resonance, which agreed reasonably well with the values calculated by micromagnetic simulation. The calculation also indicated that the interaction between elements could be neglected when the edge-to-edge spacing between neighboring elements was larger than 3 μm in our patterned films.CoNiFe patterned films with rectangular elements, all 600-nm wide but of different lengths, were fabricated and inves- tigated by ferromagnetic resonance experiment and micromagnetic simulation. An in-plane magnetic uniaxial anisotropy was exhibited, and its value increases with the increase of the aspect ratio of the elements, which was fitted by the model, including a quasi-ellipsoid demagnetizing field and a non-uniform demagnetizing field. The relative importance of the non- uniform demagnetizing field decreased from 0.26 to 0.16 with the increase of the length-width aspect ratio of the patterned element from 1.5 to 10. The demagnetizing factors in the three principal axes were determined from the experimental data of ferromagnetic resonance, which agreed reasonably well with the values calculated by micromagnetic simulation. The calculation also indicated that the interaction between elements could be neglected when the edge-to-edge spacing between neighboring elements was larger than 3 μm in our patterned films.

关 键 词：patterned film shape anisotropy ferromagnetic resonance 

分 类 号：O482.5[理学—固体物理]