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题名: Anisotropy of magnetic properties in ferrimagnetic ytterbium iron garnet under high magnetic fields
作者: Wang W;  Yue Y;  Li DY
发表日期: 2009
摘要: The magnetic anisotropy in ytterbium iron garnet (YbIG) is theoretically investigated under high magnetic fields (up to 160 kOe). According to the crystal field effect in ytterbium gallium garnet (YbGaG), a detailed discussion of crystal-field interaction in YbIG is presented where a suitable set of crystal-field parameters is obtained. Meanwhile, the influences of nine crystal-field parameters on the crystal-field energy splitting are analyzed. On the other hand, considering the ytterbium-iron (Yb-Fe) superexchange interaction of YbIG, the spontaneous magnetization is calculated at different temperatures for the [111] direction. In particular, we demonstrate that the Wesis constant lambda is the function of 1/T in YbIG. In addition, the field dependences of the magnetization for the [110] and [111] directions are theoretically described where a noticeable anisotropy can be found. Our theory further confirms the great contribution of anisotropic Yb-Fe superexchange interaction to the anisotropy of the magnetization in YbIG. Moreover, our theoretical results are compared with the available experiments.
KOS主题词: Crystal field theory;  garnets;  induced anisotropy (magnetic);  demagnetisation;  exchange interactions (electron);  ytterbium compounds
刊名: JOURNAL OF APPLIED PHYSICS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Wang W ; Yue Y ; Li DY .Anisotropy of magnetic properties in ferrimagnetic ytterbium iron garnet under high magnetic fields ,JOURNAL OF APPLIED PHYSICS,2009 ,105(8):Art. No. 083909
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