New aspects of light-induced charge transport in potassium tantalate crystals doped by copper and iron

被引：0
作者：
Badalyan, A. G.
Azzoni, C. B. [2 ]
Galinetto, P. [2 ]
Mozzati, M. C. [2 ]
Jastrabik, L. [1 ,3 ]
Rosa, J. [3 ]
Hrabovsky, M. [2 ]
Syrnikov, P. P. [3 ]
Trepakov, V. A. [2 ,3 ]
机构：
[1] AS CR, Inst Phys, Prague 18221 8, Czech Republic
[2] Pavia Univ, INFM Dipartimento Fis, I-27100 Pavia, Italy
[3] AS CR, Inst Phys, Prague 18221 8, Czech Republic
来源：
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 3 | 2007年 / 4卷 / 03期
关键词：
D O I：
10.1002/pssc.200673805
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The light-induced charge transport process in as grown and thermally treated in oxygen atmosphere nominally pure KTaO3 (KTO) single crystals and KTO doped by Cu (KTO: Cu) and Fe (KTO: Fe) were studied by electron paramagnetic resonance (EPR). A sizeable increasing of the EPR signal Of Cu2+ centers and reducing for Fe3+ centers was observed under UV illumination (365nm) in the oxidized KTO:Cu and KTO:Fe crystals respectively. This effect is considered as a sequence of the light induced charge exchange between Cu+ and Cu2+, and between Fe3+ and Fe2+ centers. Correlation between temperature dependencies of the EPR signals and photoconductivity was found and discussed too. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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收藏
页码：1368 / +
页数：2
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