中国物理B ›› 2005, Vol. 14 ›› Issue (10): 2127-2132.doi: 10.1088/1009-1963/14/10/034

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Crystal field analysis of the magnetic properties of RFe11Ti and RFe11TiH (R=Sm, Tb, Ho)

宿刚1, 许淑伟1, 杜晓波1, 金汉民1, 王向群1, 闫羽2   

  1. (1)Department of Physics, Jilin University, Changchun 130023, China; (2)Department of Physics, Jilin University, Changchun 130023, China;State Key Laboratory for Superhard Materials, Jilin University,Changchun 130012, China
  • 收稿日期:2005-03-18 修回日期:2005-05-11 出版日期:2005-10-20 发布日期:2005-10-20
  • 基金资助:
    Project supported by the Department of Science and Technology of Jilin Province, Specialized Research Fund for the Doctoral Program of Higher Education and the National Natural Science Foundation of China (Grant No 10304006).

Crystal field analysis of the magnetic properties of RFe11Ti and RFe11TiH (R=Sm, Tb, Ho)

Su Gang (宿刚)a, Yan Yu (闫羽)ab, Xu Shu-Wei (许淑伟)a, Du Xiao-Bo (杜晓波)a, Jin Han-Min (金汉民)a, Wang Xiang-Qun (王向群)a   

  1. a Department of Physics, Jilin University, Changchun 130023, China; b  State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China
  • Received:2005-03-18 Revised:2005-05-11 Online:2005-10-20 Published:2005-10-20
  • Supported by:
    Project supported by the Department of Science and Technology of Jilin Province, Specialized Research Fund for the Doctoral Program of Higher Education and the National Natural Science Foundation of China (Grant No 10304006).

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摘要： The crystalline-electric-field parameters A_nm for RFe_11Ti and RFe_{11}TiH (R=Sm,Tb,Ho) are evaluated by fitting calculations to the magnetization curves measured on the single crystals or on magnetically aligned powder samples at 4.2K and higher temperatures. Interstitial hydrogen atom in RFe_11Ti has been found to have a significant effect on crystalline-electric-field parameters A_nm. By using the parameters of exchange field 2\textit\mu _BH_ex estimated from inelastic neutron scattering experiments and the fitted A_nm, the calculations can reproduce the experimental curves well.

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

Abstract: The crystalline-electric-field parameters Anm for RFe11Ti and RFe11TiH (R=Sm,Tb,Ho) are evaluated by fitting calculations to the magnetization curves measured on the single crystals or on magnetically aligned powder samples at 4.2K and higher temperatures. Interstitial hydrogen atom in RFe_11Ti has been found to have a significant effect on crystalline-electric-field parameters Anm. By using the parameters of exchange field 2$\mu$BHex estimated from inelastic neutron scattering experiments and the fitted Anm, the calculations can reproduce the experimental curves well.

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

中图分类号:  (Crystal-field theory and spin Hamiltonians)

  • 75.10.Dg
75.50.Bb (Fe and its alloys) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.30.Et (Exchange and superexchange interactions) 75.30.Gw (Magnetic anisotropy)