Optical in situ study of the reduction/oxidation processes in YAlO3:Mn crystals

被引：3
|
作者：
Zhydachevskii, Ya [1 ]
Buryy, O. [1 ]
Sugak, D. [2 ]
Ubizskii, S. [1 ]
Boerger, A. [3 ]
Becker, K-D [3 ]
Suchocki, A. [4 ,5 ]
Berkowski, M. [4 ]
机构：
[1] Lviv Polytech Natl Univ, UA-79646 Lvov, Ukraine
[2] SRC Carat, Inst Mat, UA-79031 Lvov, Ukraine
[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys & Theoret Chem, D-38106 Braunschweig, Germany
[4] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
[5] Univ Bydgoszcz, Inst Phys, PL-85072 Bydgoszcz, Poland
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 17期
关键词：
YTTRIUM ORTHOALUMINATE; SINGLE-CRYSTALS; MANGANESE IONS; GROWTH; QUALITY;
D O I：
10.1088/0953-8984/21/17/175411
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The paper presents experimental results on an in situ optical absorption study of the reduction/oxidation processes in YAlO3:Mn crystals that are visible in the Mn4+ <-> Mn5+ recharging of manganese ions. The appearance of the Mn5+ absorption during annealing in an oxidizing atmosphere as well as its bleaching during annealing of the crystal in a reducing atmosphere have been studied in the temperature range from 800 to 1250 K. The oxidation and reduction kinetics are analyzed in the framework of the vacancies diffusion model and compared with the nominally pure and Nd-doped YAlO3 crystals studied previously.
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页数：6
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