AN INDUCED CR3+ CENTER IN GAMMA-IRRADIATED LITAO3

被引：0

作者：

AHN, SW ^{[1
]}

KIM, JS ^{[1
]}

CHOH, SH ^{[1
]}

YEOM, TH ^{[1
]}

机构：

[1] SEONAM UNIV,DEPT PHYS,NAMWON 590170,SOUTH KOREA

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 1994年 / 27卷 / 05期

关键词：

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An induced Cr3+ center in gamma-irradiated LiTaO3 has been investigated by employing a Bruker X-band EPR spectrometer at room temperature. Since no EPR signal could be measured in the as-grown crystal by the Czochralski method, the sample was irradiated with Co-60 gamma-rays up to about 1.5 Mrad. The induced Cr3+ center was similar to the previously reported Cr3+ center, but turned out to be thermally unstable. The signal intensities reduced rapidly with time, and eventually disappeared totally after 72 hours. A possible origin of this induced Cr3+ center is the mechanism hnu + Cr2+ --> Cr3+ + e-. It is proposed that the Cr3+ ions preferably substitute for either Li1+ or Ta5+.

引用

页码：535 / 537

页数：3

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