On the Magnetic Ground State of La(0.85)Sr(0.15)CoO(3) Single Crystals

Manna, Kaustuv and Samal, Debakanta and Elizabeth, Suja and Bhat, HL and Kumar, Anil PS (2011) On the Magnetic Ground State of La(0.85)Sr(0.15)CoO(3) Single Crystals. In: The Journal of Physical Chemistry C, 115 (29). pp. 13985-13990.

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Abstract

We present an extensive study on magnetic and transport properties of La(0.85)Sr(0.15)CoO(3) single crystals grown by a float zone method to address the issue of phase separation versus spin-glass (SG) behavior. The dc magnetization study reveals a kink in field-cooled magnetization, and the peak in the zero-field-cooling curve shifts to lower temperature at modest dc fields, indicating the SG magnetic phase. The ac susceptibility study exhibits a considerable frequency-dependent peak shift (similar to 4 K) and a time-dependent memory effect below the freezing temperature. In addition, the characteristic time scale tau(0) estimated from the frequency-dependent ac susceptibility measurement is found to be similar to 10(-13) s, which matches well with typical values observed in canonical SG systems. The transport relaxation study evidently demonstrates the time-dependent glassy phenomena. In essence, all our experimental results corroborate the existence of SG behavior in La(0.85)Sr(0.15)CoO(3) single crystals.

Item Type:	Journal Article
Publication:	The Journal of Physical Chemistry C
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	05 Aug 2011 08:24
Last Modified:	21 Oct 2011 05:55
URI:	http://eprints.iisc.ac.in/id/eprint/39731

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