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Evidence for low temperature glassy behavior in La0.5Sr0.5CoO3

Samal, D and Kumar, Anil PS (2012) Evidence for low temperature glassy behavior in La0.5Sr0.5CoO3. In: Journal of Applied Physics, 111 (4).

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We report the observed low temperature spin glass like feature in the optimally doped La0.5Sr0.5CoO3 ferromagnetic system. The characteristic of glassy behavior has been identified by noting (i) the frequency-dependent shift of the low temperature hump position in the out of phase ac susceptibility component; (ii) evolution of freezing temperature with dc biasing field that adheres to de Almeida-Thouless relation; (iii) memory effect; and (iv) sluggish magnetic relaxation. The results of magnetic measurements demonstrate that neither the inter-cluster interaction nor the spin disorder at the interface between ferromagnetic clusters is responsible for the manifestation of such collective glassy behavior. Rather, it is believed to arise from a distinct cluster glass like phase that possibly coexists with the dominant ferromagnetic phase. (C) 2012 American Institute of Physics. [doi:10.1063/1.3684610]

Item Type: Journal Article
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Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 10 Apr 2012 07:36
Last Modified: 10 Apr 2012 07:36
URI: http://eprints.iisc.ernet.in/id/eprint/44167

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