期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 69, 期 1, 页码 182-186出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2007.08.013
关键词
semiconductors; transport properties
The photo-induced AC-impedance method is used as a versatile instrumentation to study the trap state densities and the carrier relaxation times in magneto-resistive manganites and magneto-conductive manganates and thus as a probe to check the crystal quality, which is important for the performance of any device material. A comparative study using compounds of different defect densities is presented. High defect concentrations in the compounds are identified through the photoresistivity and/or the photo-induced capacitive build up. (c) 2007 Elsevier Ltd. All rights reserved.
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