Growth-induced magnetic and optic anisotropy in bismuth-substituted iron garnet films
Growth-induced magnetic and optic anisotropy in bismuth-substituted iron garnet films
复制标题
铋取代铁石榴石薄膜中生长引起的磁和光各向异性
DOI：
10.1063/1.101350
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发表时间：
1989
影响因子：
4
通讯作者：
W. Tolksdorf
中科院分区：
文献类型：
--
作者：
H. Lenz;P. Hansen;W. Tolksdorf
研究了（111）取向的外延铁石榴石薄膜（R=Y，Gd，Sm）的生长诱导单轴磁各向异性常数Kgu和生长诱导双折射率Δng随过冷温度ΔTs的变化.单轴各向异性常数Kgu随着ΔTs的增加而线性增加（0≤ΔTs≤100 K），这与其他铋取代稀土铁石榴石的结果一致。Δng是Kgu和ΔTs的线性函数。与Kgu相反，Δng与稀土物种R无关。光学各向异性主要来自八面体和四面体网站上的铁离子，可以通过铁子晶格中的石榴石晶体的抗磁稀释的强烈影响所示。
The growth‐induced uniaxial magnetic anisotropy constant Kgu and the growth‐induced birefringence Δng of (111) oriented epitaxial iron garnet films of composition R3−xBixFe5−yAlyO12 with R=Y, Gd, Sm have been investigated as a function of supercooling temperature ΔTs. The uniaxial anisotropy constant Kgu increases linearly with increasing ΔTs (0≤ΔTs≤100 K) in agreement with results reported for other bismuth‐substituted rare‐earth iron garnets. Δng turns out to be a linear function of Kgu and ΔTs. Δng is independent of the rare‐earth species R in contrast to Kgu. The optical anisotropy arises primarily from the iron ions on the octahedral and tetrahedral sites as could be shown by the strong influence of diamagnetic dilution of the iron sublattices in the garnet crystal.