Evaluation of the intrinsic magneto-dielectric coupling in LaMn0.5Co0.5O3 single crystals

Manna, Kaustuv and Joshi, Rajeev S and Elizabeth, Suja and c, Anil PS (2014) Evaluation of the intrinsic magneto-dielectric coupling in LaMn0.5Co0.5O3 single crystals. In: APPLIED PHYSICS LETTERS, 104 (20).

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Abstract

The magneto-dielectric coupling in (l00) oriented LaMn0.5Co0.5O3 single crystals has been investigated using temperature, frequency, and magnetic field dependent dielectric response. Electronic transport data divulges that polaronic hopping arises due to Emin-Holstein adiabatic small polarons. Spin realignment through external magnetic field favors faster polaronic hopping by lowering activation energy for dielectric relaxation. Finally, positive magneto-dielectricity and magnetoloss under increasing magnetic field at high frequency of the exciting ac field confirms intrinsic magneto-dielectric effect in disordered ferromagnetic-insulator LaMn0.5Co0.5O3. This study also emphasizes the need to use single crystals as well as the frequencies higher than the corresponding inverse relaxation time. (C) 2014 AIP Publishing LLC.

Item Type:	Journal Article
Publication:	APPLIED PHYSICS LETTERS
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to the AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	25 Jul 2014 10:21
Last Modified:	25 Jul 2014 10:21
URI:	http://eprints.iisc.ac.in/id/eprint/49436

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