Spectroscopic study of KTiOAsO4 single crystals doped with In, Sc, Fe

被引：9
|
作者：
Mashkovtsev, RI [1 ]
Isaenko, LI [1 ]
机构：
[1] DESIGN & TECHNOL INST MONOCRYSTALS,NOVOSIBIRSK 630058,RUSSIA
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1996年 / 198卷 / 02期
关键词：
NONLINEAR-OPTICAL-PROPERTIES; HOLE CENTER; KTIOPO4; GENERATION; NIOBIUM; DEFECT;
D O I：
10.1002/pssb.2221980203
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Electron paramagnetic resonance and optical absorption in the visible and infrared regions have been used to study flux-grown KTiOAsO4 crystals doped with In, Sc, and Fe. An unstable broad absorption band and paramagnetic hole centres in KTA: In or Sc after gamma-irradiation are observed. The analysis of EPR data leads to a model wherein the holes are trapped on bridging oxygen ions between two titanium ions. The optical absorption band at 2.7 eV is ascribed to the light-induced transfer of holes from one oxygen ion to another. Infrared absorption bands at 3584 and 3594 cm(-1) are observed in all crystals and possible positions of the OH group in the structure are discussed.
引用
收藏
页码：577 / 585
页数：9
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