ELECTRON-SPIN-RESONANCE AND ELECTRON NUCLEAR DOUBLE-RESONANCE INVESTIGATION OF A NEW CR-3+ DEFECT ON AN NB SITE IN LINBO3-MG-CR

被引：74

作者：

CORRADI, G ^{[1
]}

SOTHE, H ^{[1
]}

SPAETH, JM ^{[1
]}

POLGAR, K ^{[1
]}

机构：

[1] UNIV GESAMTHSCH PADERBORN,FACHBEREICH PHYS,W-4790 PADERBORN,GERMANY

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1991年 / 3卷 / 12期

关键词：

D O I：

10.1088/0953-8984/3/12/020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

For LiNbO3 crystals heavily doped with Mg and codoped with Cr a single isotropic ESR line with g = 1.971 +/- 0.002 and a minimal linewidth of 1.8 +/- 0.2 mT has been observed. With ENDOR it could be shown unambiguously that the new defect is Cr3+ substituting for Nb. The Cr-53 hyperfine and quadrupole constants are A parallel-to = 50.8 +/- 0.2 MHz, A perpendicular-to = 51.0 +/- 0.2 MHz and P = 0.10 +/- 0.05 MHz. The crystal field at the chromium site is smaller by more than an order of magnitude than for previously reported Cr3+ centres in LiNbO3, indicating that those centres are not on the Nb site.

引用

页码：1901 / 1908

页数：8

共 17 条

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