Investigation of the origin of glassiness in La0.5Sr0.5CoO3

Manna, Kaustuv and Elizabeth, Suja and Kumar, Anil PS (2013) Investigation of the origin of glassiness in La0.5Sr0.5CoO3. In: Journal of Applied Physics, 113 (17). 17E114_1-17E114_3.

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Abstract

A comprehensive magnetic study has been carried out on the two sets of La0.5Sr0.5CoO3 samples with a view to understand the origin of low temperature glassiness in the ferromagnetic state. The samples prepared by the conventional solid-state synthesis method show a low temperature shoulder in both dc magnetization as well as in the ac susceptibility measurements, which exhibit characteristics of glassiness such as the frequency dependence and memory effect. These observations suggest the existence of a distinct low temperature cluster-glass like phase within dominant ferromagnetic phase. But, once the same sample is properly homogenized by repeated grinding and annealing process, the low temperature glassy phase disappears, and it shows a pure ferromagnetic behavior. Our comparative study clearly reveals that the reentrant spin-glass like nature is not intrinsic to La0.5Sr0.5CoO3 system, in fact this is an outcome of the compositional inhomogeneity.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	05 Jul 2013 06:01
Last Modified:	05 Jul 2013 06:01
URI:	http://eprints.iisc.ac.in/id/eprint/46792

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