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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/12818

Title: Effects of quenched disorder on Griffiths phase and EPR line width in La0.67-2xNd2xCa0.33-xSrxMnO3 manganites
Authors: YASSIN, OA
MOHAMED, MI
BHATIA, SN
Keywords: electron-paramagnetic-resonance
Issue Date: 2008
Publisher: WILEY-V C H VERLAG GMBH
Citation: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 245(4), 745-749
Abstract: It is widely accepted that there is Griffiths phase (GP) present in the paramagnetic phase in doped manganites. We studied the effect of quenched disorder on the region of GP in connection with the temperature dependence of the line width (Delta H) of the electron paramagnetic resonance (EPR) in La0.67-2xNd2xCa0.33-xSrxMnO3 (x = 0, 0.1, 0.15, 0.2 and 0.25). With this approach it is found that Delta H(T), the minimum in the line width (Delta H-min) and T-min are reproduced. With increasing values of the quenched disorder the values of Delta H-min are found to increase. A numerical relation that correlates the temperature range in which GP exists and the cation size disorder is obtained and found to be in agreement with some reported data. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI: http://dx.doi.org/10.1002/pssb.200743180
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12818
http://hdl.handle.net/10054/12818
ISSN: 0370-1972
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