中国物理B ›› 2006, Vol. 15 ›› Issue (9): 2146-2150.doi: 10.1088/1009-1963/15/9/040

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Crystal field analysis of the magnetization curves of R2Fe17 and R2Fe17H3 (R=Tb,Ho,Er)

马如贵1, 杜晓波1, 王向群1, 苏峰1, 金汉民1, 闫羽2, 张艳香3   

  1. (1)Department of Physics, Jilin University, Changchun 130021, China; (2)Department of Physics, Jilin University, Changchun 130021, China;State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012,China ; (3)Jilin Provincial Institute of Education, Changchun 130022, China
  • 收稿日期:2006-02-08 修回日期:2006-03-24 出版日期:2006-09-20 发布日期:2006-09-20
  • 基金资助:
    Project supported by Department of Science and Technology of Jilin Province and the National Natural Science Foundation of China (Grant No 10304006).

Crystal field analysis of the magnetization curves of R2Fe17 and R2Fe17H3 (R=Tb,Ho,Er)

Ma Ru-Gui(马如贵)a), Yan Yu(闫羽)a)b)†, Zhang Yan-Xiang(张艳香)c), Du Xiao-Bo(杜晓波)a), Wang Xiang-Qun(王向群)a), Su Feng(苏峰)a), and Jin Han-Min(金汉民)a)   

  1. a Department of Physics, Jilin University, Changchun 130021, China; b State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China ; c Jilin Provincial Institute of Education, Changchun 130022, China
  • Received:2006-02-08 Revised:2006-03-24 Online:2006-09-20 Published:2006-09-20
  • Supported by:
    Project supported by Department of Science and Technology of Jilin Province and the National Natural Science Foundation of China (Grant No 10304006).

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摘要： In this paper the values of the crystalline-electric-field parameters Anm for R2Fe17 and R2Fe17H3 (R=Tb,Ho,Er) are evaluated by fitting calculations to the magnetization curves measured on the single crystal at several temperatures. The fitted Anm for R2Fe17 are strikingly different from those for the corresponding R2Fe17H3. The energy gaps between the lowest four energy levels for Ho ions in Ho2Fe172 can be reproduced by using the fitted Anm and exchange field 2μBHex, which estimated from the fit of the temperature dependence of the spontaneous magnetization combined with inelastic neutron scattering experiment.

关键词: magnetization curves, magnetic anisotropy, rare-earth compounds, crystalline-electric-field

Abstract: In this paper the values of the crystalline-electric-field parameters Anm for R2Fe17 and R2Fe17H3 (R=Tb,Ho,Er) are evaluated by fitting calculations to the magnetization curves measured on the single crystal at several temperatures. The fitted Anm for R2Fe17 are strikingly different from those for the corresponding R2Fe17H3. The energy gaps between the lowest four energy levels for Ho ions in Ho2Fe17 can be reproduced by using the fitted Anm and exchange field 2μBHex, which estimated from the fit of the temperature dependence of the spontaneous magnetization combined with inelastic neutron scattering experiment.

Key words: magnetization curves, magnetic anisotropy, rare-earth compounds, crystalline-electric-field

中图分类号:  (Quantum dots)

  • 73.63.Kv
73.21.La (Quantum dots)