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Study of Chromium Impurities in SrTiO3 by Photo-Electron Paramagnetic Resonance Spectroscopy

Published online by Cambridge University Press:  01 February 2011

Jamiyanaa Dashdorj  and
Mary Ellen Zvanut
Jamiyanaa Dashdorj
Affiliation:
[email protected], University of Alabama at Birmingham, Physics Department, 1300 University Boulevard, Birmingam, AL, 35294, United States, 205-975-8078, 205-934-8042
Mary Ellen Zvanut
Affiliation:
[email protected], University of Alabama at Birmingham, Physics Department, 1300 University Boulevard, Birmingam, AL, 35294, United States
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Abstract

Chromium impurities in SrTiO3 grown by Verneuil and Float-zone methods were investigated using photo-electron paramagnetic resonance spectroscopy. The samples are the substrates typically used for deposition of multifunctional and ferromagnetic films. A maximum optical cross section for Cr3+ of 2.6×10−18 cm2 is obtained from the time-dependent data, and steady state measurements suggest the presence of a defect level 2 eV from one of the band edges. The cross section is similar to that obtained from optical absorption studies of Cr3+ in semiconductors. The results produced here should be useful for those trying to interpret photoluminescence or similar optical characterization data.

Keywords

electron spin resonanceCrabsorption
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1034 , 2007 , 1034-K10-19
Copyright
Copyright © Materials Research Society 2008

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