Dynamics of the low temperature inhomogeneous phase in manganese perovskites

Castellano, C and Cordero, F and Cantelli, R and Ferretti, M and Sarma, DD (2001) Dynamics of the low temperature inhomogeneous phase in manganese perovskites. In: Solid State Communications, 120 (7-8). pp. 317-320.

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Abstract

The anelastic spectra of $La_{1-x}Ca_xMnO_3$ with x=0.40 have been measured in a wide temperature range. The ferromagnetic–paramagnetic and the structural orthorhombic–trigonal phase transitions are clearly identified and the nature of an elastic energy loss peak just below $T_C$ is discussed. Its temperature and frequency dependences are typical of the dynamic susceptibilities of phase inhomogeneous or frustrated compounds like relaxor ferroelectric perovskites or spin glasses. Then at low temperature these systems seem to be characterized by a phase separation scenario presenting a glass-like dynamics. The bases of a forthcoming quantitative study have been identified.

Item Type:	Journal Article
Publication:	Solid State Communications
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Spin glasses;Acoustic properties;Phase transitions.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	25 Sep 2008 11:14
Last Modified:	19 Sep 2010 04:50
URI:	http://eprints.iisc.ac.in/id/eprint/16017

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