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Relaxation dynamics and thermodynamic properties of glassy Tb0.5Sr0.5MnO3 single crystal

Nhalil, Hariharan and Elizabeth, Suja (2017) Relaxation dynamics and thermodynamic properties of glassy Tb0.5Sr0.5MnO3 single crystal. In: SOLID STATE COMMUNICATIONS, 253 . pp. 24-30.

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Official URL: http://dx.doi.org/10.1016/j.ssc.2017.01.026

Abstract

Single crystals of Tb0.5Sr0.5MnO3 were grown in an optical float zone furnace and their magnetic and thermodynamic properties were studied. Temperature dependent DC magnetization measurements at different fields show strong irreversibility below the magnetic anomaly at 44 K. The upward deviation from ideal CW behavior well above the transition temperature and its field independent nature are signatures of non-Griffiths phase. The origin non-Griffiths phase owe to competition between the antiferromagnetic and ferromagnetic Mn3+ Mn4+ interactions mediated through intervening oxygen. Further, 44 K transition is confirmed as a magnetic glassy transition. The estimated dynamical spin flip time (tau(o)=2.11(3) x10(-14) s) and zv(9.3(2)) values fall into the range of typical spin-glass systems. Detailed memory and temperature cycling relaxation measurements were performed and support the Hierarchical relmtation model. Low-temperature specific heat data displays a linear term, identifying the glassy magnetic phase contribution.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 20 May 2017 03:47
Last Modified: 20 May 2017 03:47
URI: http://eprints.iisc.ac.in/id/eprint/56689

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