中国物理B ›› 2013, Vol. 22 ›› Issue (5): 56801-056801.doi: 10.1088/1674-1056/22/5/056801

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Demagnetizing factors in patterned CoNiFe films with rectangular elements

章羽a, 张栋a b, 王昱坤a, 尹玉莉a, 黄兆聪a, 罗琛a, 翟亚a   

  1. a Department of Physics, Southeast University, Nanjing 211100, China;
    b School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
  • 收稿日期:2012-09-18 修回日期:2012-11-07 出版日期:2013-04-01 发布日期:2013-04-01
  • 基金资助:
    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), and the National Laboratory of Solid State Microstructures at Nanjing University and Southeast University, China.

Demagnetizing factors in patterned CoNiFe films with rectangular elements

Zhang Yu (章羽)a, Zhang Dong (张栋)a b, Wang Yu-Kun (王昱坤)a, Yin Yu-Li (尹玉莉)a, Huang Zhao-Cong (黄兆聪)a, Luo Chen (罗琛)a, Zhai Ya (翟亚)a   

  1. a Department of Physics, Southeast University, Nanjing 211100, China;
    b School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China
  • Received:2012-09-18 Revised:2012-11-07 Online:2013-04-01 Published:2013-04-01
  • Contact: Zhang Dong, Zhai Ya E-mail:physzd@yahoo.com; yazhai@seu.edu.cn
  • Supported by:
    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), and the National Laboratory of Solid State Microstructures at Nanjing University and Southeast University, China.

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摘要： CoNiFe patterned films with rectangular elements, all 600 nm wide but of different lengths, were fabricated and investigated by ferromagnetic resonance experiment and micromagnetic simulation. An in-plane magnetic uniaxial anisotropy was exhibited, and its value increases with an increase in 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 an increase in 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 μ in our patterned films.

关键词: patterned film, shape anisotropy, ferromagnetic resonance

Abstract: CoNiFe patterned films with rectangular elements, all 600 nm wide but of different lengths, were fabricated and investigated by ferromagnetic resonance experiment and micromagnetic simulation. An in-plane magnetic uniaxial anisotropy was exhibited, and its value increases with an increase in 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 an increase in 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 μ in our patterned films.

Key words: patterned film, shape anisotropy, ferromagnetic resonance

中图分类号:  (Physical properties of thin films, nonelectronic)

  • 68.60.-p
75.30.Gw (Magnetic anisotropy)