The Faraday rotation on single crystal garnets of composition Dy/sub 3-x/Bi/sub x/Fe/sub 5/O/sub 12/ with x=0.43 has been investigated in the temperature range 10 K>T>300 K at lambda =1150 nm. The data are described in terms of the corresponding sublattice magnetizations assuming that the contribution of the Fe/sup 3+/ ions to Faraday rotation (FR) is the same as for bismuth substituted yttrium garnet (for identical x value). The first order magnetooptical (MO) coefficient (C/sub e/) of the Dy3+ ion is deduced; in the spontaneous state, C/sub e/ is linear temperature dependent as previously found in pure DyIG with a decrease of C/sub e/ of about 30-50% induced by the presence of bismuth.
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机译：在温度为10 K> T> 300 K的条件下，研究了组成为Dy / sub 3-x / Bi / sub x / Fe / sub 5 / O / sub 12 /且组成为Dy = 0.43的单晶石榴石的法拉第旋转。 λ= 1150 nm。假设Fe / sup 3 + /离子对法拉第旋转（FR）的贡献与铋取代的钇石榴石（对于相同的x值）相同，则根据相应的亚晶格磁化强度描述了数据。推导出Dy3 +离子的一阶磁光（MO）系数（C / sub e /）；在自发状态下，C / sub e /是线性温度依赖性的，如先前在纯DyIG中所发现的那样，铋的存在引起C / sub e /的降低约30-50％。
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