Garnets with high magnetooptic figures of merit in the visible region
Garnets with high magnetooptic figures of merit in the visible region
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在可见光区域具有高磁光品质因数的石榴石
DOI：
10.1109/tmag.1973.1067670
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发表时间：
1973
影响因子：
2.1
通讯作者：
J. Page
中科院分区：
文献类型：
--
作者：
D. Lacklison;G. Scott;H. I. Ralph;J. Page
本文研究了在各种单晶铁石榴石中掺入铋对法拉第旋光和光吸收的影响。由铋的存在产生的对法拉第旋转的大的负贡献是抗磁性形式的，并且与415 nm附近的光学跃迁相关联。铋贡献的大小取决于铋和四面体配位的Fe 3+离子的浓度，这表明这两种离子都参与了负责额外旋转的过渡。由铋引起的吸收随着波长的减小而增加。然而，旋转幅度的增加使得品质因数增加到高于YIG的品质因数，峰值在560 nm处，值为5.2 deg/dB。适用于磁光器件的低磁化石榴石的法拉第旋转和品质因数也由于铋的存在而在可见光中增加。
This paper describes the effects on Faraday rotation and optical absorption of substituting bismuth into various single crystal iron garnets. The large negative contribution to the Faraday rotation produced by the presence of bismuth is of the diamagnetic form and is associated with an optical transition around 415 nm. The magnitude of the bismuth contribution depends on the concentrations of bismuth and tetrahedrally coordinated Fe3+ions, suggesting that both these ions are involved in the transition responsible for the additional rotation. The absorption arising from the bismuth increases with decreasing wavelengths. However, the increase in magnitude of the rotation is such that the figure of merit is increased above that of YIG, peaking at 560 nm with a value of 5.2 deg/dB. The Faraday rotation and figure of merit of low magnetization garnets, suitable for magnetooptic devices, are also increased in the visible by the presence of bismuth.