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ELECTRON-PARAMAGNETIC-RESONANCE STUDY OF RHODIUM IMPURITY IONS IN KTIOPO4 SINGLE-CRYSTALS

被引：21
作者：
BRAVO, D
MARTIN, MJ
GAVALDA, J
DIAZ, F
ZALDO, C
LOPEZ, FJ
机构：
[1] CSIC,INST CIENCIA MAT,E-28046 MADRID,SPAIN
[2] UNIV ROVIRA & VIRGILI,FIS APLICADA & CRISTALOG LAB,TARRAGONA,SPAIN
来源：
PHYSICAL REVIEW B | 1994年 / 50卷 / 22期
关键词：
D O I：
10.1103/PhysRevB.50.16224
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An electron-paramagnetic-resonance (EPR) investigation at 90 K of rhodium impurities in thermally reduced KTP crystals is reported. The EPR spectra are assigned to two rhodium centers. It is proposed that the corresponding defects are Rh2+ ions substituting for titanium in the two Ti sites of the KTP structure. The spin-Hamiltonian parameters are analyzed and the possible mechanisms accounting for the distortion around the impurity are discussed. Reducing thermal treatments in vacuum of KTP crystals induce a strong increase of the observed EPR spectra, indicating that most rhodium impurities enter in KTP as Rh3+ ions. © 1994 The American Physical Society.
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页码：16224 / 16231
页数：8
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