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：

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

页码：577 / 585

页数：9

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