Dielectric properties of Y3Fe5O12 garnet crystals in the IR range
Dielectric properties of Y3Fe5O12 garnet crystals in the IR range
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DOI：
10.1134/1.2132404
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发表时间：
2005-11
影响因子：
0.7
通讯作者：
I. Lomako;S. Shashkov;I. Makoed
中科院分区：
文献类型：
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作者：
I. Lomako;S. Shashkov;I. Makoed
研究了一系列不同结构和光学质量的钇铁石榴石单晶在红外波段（400-1000 cm−1）的介电性能。揭示了石榴石样品的介电常数ε∞与载流子分数（参数k/nk）的关系。发现含有磁活性Sm和Mn离子作为主要杂质的样品的ε∞最大值，这增加了传导电子的浓度，因此提供了大的k/nk值。建立了Y_3Fe_5O_（12）样品的ε_∞与氧离子浓度之间的关系。
The dielectric properties of a series of yttrium-iron garnet single crystals of different structural and optical quality are investigated in the IR range (400–1000 cm−1). Some regularities of the dependence of the permittivity ε∞of the garnet samples on the charge-carrier fraction (the parameterk/nk) are revealed. The maximum values of ε∞are found for the samples containing magnetoactive Sm and Mn ions as dominant impurities, which increase the concentration of conduction electrons and, therefore, provide large values ofk/nk. A correlation between ε∞of the Y3Fe5O12samples and the concentration of oxygen ions is established.