Low temperature hysteresis of light reflection from bismuth germanate single crystals

被引：0
作者：
B. P. Tsapenko
A. B. Tsapenko
V. G. Bondar’
机构：
[1] Karazin Kharkov National University,Institute for Scintillation Materials
[2] National Academy of Sciences of Ukraine,undefined
来源：
Optics and Spectroscopy | 2011年 / 110卷
关键词：
Angular Dependence; Superficial Layer; Total Internal Reflection; Light Reflection; Reflection Intensity;
D O I：
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中图分类号：
学科分类号：
摘要：
We measured the temperature dependences of light reflection and transmission of bismuth germanate single crystals upon cyclic variation of their temperature in the range of 94–340 K. We revealed an asymmetric temperature hysteresis of reflection, which is accompanied by a change in the Rayleigh scattering. Heating of crystals, in contrast to their cooling, is accompanied by a decrease in the reflection in the range of 100–287 K and near 310 K. We found that reflection minima in the first and second temperature ranges arise as a result of the action of different mechanisms. We assume that temperature changes in the reflection are related to structural phase transitions in the superficial layer.
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页码：124 / 128
页数：4
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