Optical Properties of MgAl2O4 Crystals Grown by Iridium-Free Technology

被引：3
|
作者：
Nizhankovskyi, S. [1 ]
Kozlovskyi, A. [1 ]
Vovk, O. [1 ]
Sidelnikova, N. S. [1 ]
Siryk, Yu, V [1 ]
机构：
[1] Natl Acad Sci Ukraine, STC Inst Single Crystals, Inst Single Crystals, 60 Nauky Ave, UA-61001 Kharkiv, Ukraine
来源：
ACTA PHYSICA POLONICA A | 2022年 / 141卷 / 04期
关键词：
magnesium-aluminum spinel; horizontal directional crystallization method; molybdenum; optical absorption;
D O I：
10.12693/APhysPolA.141.371
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
It was carried out the investigation of optical absorption of magnesium-aluminum spinel (MgAl2O4) crystals. The crystals were grown by horizontal directional crystallization method in molybdenum crucible under the protective atmosphere Ar+(CO, H-2). The optical absorption spectra of MgAl2O4 crystals exhibit absorption bands (267 and 325 nm) caused by complexes of defects formed by oxygen vacancies and cations located in anti-sites. It is shown that annealing of crystals in an oxidizing environment at T = 1500 degrees C leads to the elimination of these absorption bands and the improvement of the optical properties of the grown crystals.
引用
收藏
页码：371 / 373
页数：3
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