ESR study of impurities in strontium titanate films

被引：12

作者：

Glinchuk, MD ^{[1
]}

Bykov, IP

Slipenyuk, AM

Laguta, VV

Jastrabik, L

机构：

[1] Natl Acad Sci Ukraine, Inst Mat Sci Problems, UA-03142 Kiev, Ukraine

[2] Acad Sci Czech Republ, Inst Phys, CZ-18040 Prague 8, Czech Republic

来源：

PHYSICS OF THE SOLID STATE | 2001年 / 43卷 / 05期

关键词：

D O I：

10.1134/1.1371362

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The paper reports on an ESR study of Cr- and Ca-codoped SrTiO3 films, 1700 and 350 nm thick, before and after UV irradiation (lambda = 365 nm). The spectrum of the thick film (1700 nm) exhibits two ESR lines with g factors of 1.977 and 1.974, which belong to the Cr3+ centers. In the spectrum of the thin film (350 nm), one observes only one line, which is due to the chromium center with a g factor of 1.974. Calculations showed that the line with the smaller g factor belongs to the Cr3+ center located close to the film surface. The weak line observed in the spectrum after UV irradiation (g factor = 2.012) is most likely due to the O- center. The regions of thermal stability of the observed centers were studied. A comparative analysis of the characteristics of impurities in bulk samples and films was carried out. (C) 2001 MAIK "Nauka/Interperiodica".

引用

页码：841 / 844

页数：4

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