中国物理B ›› 1994, Vol. 3 ›› Issue (8): 608-616.doi: 10.1088/1004-423X/3/8/007

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THE INFLUENCE OF THE ADMIXING OF DIFFERENT MULTIPLETS ON THE SPIN MAGNETIC MOMENT AND FARADAY EFFECT OF HARE EARTH IONS IN GARNETS

徐游1, 杨杰慧1, 张国营2   

  1. (1)Department of Physics, Nanjing University, Nanjing 210008, China; (2)Department of Physics, Zaozhuang Teacher's College, Zaozhuang 277160, China
  • 收稿日期:1993-04-06 出版日期:1994-08-20 发布日期:1994-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China and by the fund of the State Key Laboratory of Magnetism, Institute of Physics, Academia Sinica.

THE INFLUENCE OF THE ADMIXING OF DIFFERENT MULTIPLETS ON THE SPIN MAGNETIC MOMENT AND FARADAY EFFECT OF HARE EARTH IONS IN GARNETS

ZHANG GUO-YING (张国营)a, XU YOU (徐游)b, YANG JIE-HUI (杨杰慧)b   

  1. a Department of Physics, Zaozhuang Teacher's College, Zaozhuang 277160, China; b Department of Physics, Nanjing University, Nanjing 210008, China
  • Received:1993-04-06 Online:1994-08-20 Published:1994-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China and by the fund of the State Key Laboratory of Magnetism, Institute of Physics, Academia Sinica.

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摘要： The influence of the admixing of the excited multiplets of the ground configuration with the ground multiplet on the spin magnetic moment of the crystal- field-and exchange-interaction-split ground state, the Faraday rotation and the magneto-optic coefficient induced by the rare earth ions in rare-earth-substituted garnets Y3-xRxFe5O12 (R=Ce and Pr) has been calculated in this paper. It is found that, in the case of Ce3+ ions, the admixing of the 4f1 2F7/2 multiplet with the 2F5/2 multiplet makes the spin magnetic moment of the crystal-field- and exchange-interaction-split ground state increase by 140% and the Faraday rotation increase by 180% at 633nm wavelength, and 150% at 1150nm at 294 K. In the case of Pr3+ ions, the admixing of the 4f2 3H5 multiplet with the 3H4 multiplet makes the spin magnetic moment of the crystal-field- and exchange-interaction-split ground state increase by 34% and the Faraday rotation increase by 59% at 294K. The admixing of different multiplets of the Ce3+ ions makes the ratio between the magneto-optic coefficients at 50 and 294K increase by 7% at 633nm wavelength and 15% at 1150nm.

Abstract: The influence of the admixing of the excited multiplets of the ground configuration with the ground multiplet on the spin magnetic moment of the crystal- field-and exchange-interaction-split ground state, the Faraday rotation and the magneto-optic coefficient induced by the rare earth ions in rare-earth-substituted garnets Y3-xRxFe5O12 (R=Ce and Pr) has been calculated in this paper. It is found that, in the case of Ce3+ ions, the admixing of the 4f1 2F7/2 multiplet with the 2F5/2 multiplet makes the spin magnetic moment of the crystal-field- and exchange-interaction-split ground state increase by 140% and the Faraday rotation increase by 180% at 633nm wavelength, and 150% at 1150nm at 294 K. In the case of Pr3+ ions, the admixing of the 4f2 3H5 multiplet with the 3H4 multiplet makes the spin magnetic moment of the crystal-field- and exchange-interaction-split ground state increase by 34% and the Faraday rotation increase by 59% at 294K. The admixing of different multiplets of the Ce3+ ions makes the ratio between the magneto-optic coefficients at 50 and 294K increase by 7% at 633nm wavelength and 15% at 1150nm.

中图分类号:  (Saturation moments and magnetic susceptibilities)

  • 75.30.Cr
75.50.Gg (Ferrimagnetics) 78.20.Ls (Magneto-optical effects) 75.30.Et (Exchange and superexchange interactions) 75.10.Dg (Crystal-field theory and spin Hamiltonians)