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Electron paramagnetic resonance study of (La0.33Sm0.67)0.67Sr0.33−xBaxMnO3 (x<0.1): Griffiths phase

Title:

Electron paramagnetic resonance study of (La0.33Sm0.67)0.67Sr0.33−xBaxMnO3 (x<0.1): Griffiths phase

Andronenko, S.I., Rodionov, A.A., Fedorova, A.V. and Misra, Sushil K. (2013) Electron paramagnetic resonance study of (La0.33Sm0.67)0.67Sr0.33−xBaxMnO3 (x<0.1): Griffiths phase. Journal of Magnetism and Magnetic Materials, 326 . pp. 151-156. ISSN 03048853

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Official URL: http://dx.doi.org/10.1016/j.jmmm.2012.08.017

Abstract

Manganite compounds (La0.33Sm0.67)0.67Sr0.33-xBaxMnO3 with light Ba doping (x = 0.01, 0.03, 0.06, 0.09) have been investigated by EPR over the temperature range 110 – 450 K. It was found that the EPR linewidth behavior changed drastically in samples with these low Ba concentrations. For all the samples there was observed a transition from paramagnetic to ferromagnetic phase below the phase-transition temperature. EPR signals characteristic of Griffiths phase were observed in the samples with x = 0.03, 0.06, 0.09. The temperature dependence of the EPR linewidth in the paramagnetic phase was analyzed on the basis of variable-range-hoping model, which explained well the observed data.

Divisions:Concordia University > Faculty of Arts and Science > Physics
Item Type:Article
Refereed:Yes
Authors:Andronenko, S.I. and Rodionov, A.A. and Fedorova, A.V. and Misra, Sushil K.
Journal or Publication:Journal of Magnetism and Magnetic Materials
Date:2013
Digital Object Identifier (DOI):10.1016/j.jmmm.2012.08.017
ID Code:978145
Deposited By: DAVID MACAULAY
Deposited On:10 Jan 2014 19:21
Last Modified:18 Jan 2018 17:46
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