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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
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.

Type
Research Article
Copyright
Copyright © Materials Research Society 2008

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