ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La2NiMnO6

Choudhury, D and Mandal, P and Mathieu, R and Hazarika, A and Rajan, S and Sundaresan, A and Waghmare, UV and Knut, R and Karis, O and Nordblad, P and Sarma, DD (2012) Near-Room-Temperature Colossal Magnetodielectricity and Multiglass Properties in Partially Disordered La2NiMnO6. In: Physical Review Letters, 108 (12).

[img] PDF
Near-Room.pdf - Published Version
Restricted to Registered users only

Download (858Kb) | Request a copy
Official URL: http://prl.aps.org/abstract/PRL/v108/i12/e127201

Abstract

We report magnetic, dielectric, and magnetodielectric responses of the pure monoclinic bulk phase of partially disordered La2NiMnO6, exhibiting a spectrum of unusual properties and establish that this compound is an intrinsically multiglass system with a large magnetodielectric coupling (8%-20%) over a wide range of temperatures (150-300 K). Specifically, our results establish a unique way to obtain colossal magnetodielectricity, independent of any striction effects, by engineering the asymmetric hopping contribution to the dielectric constant via the tuning of the relative-spin orientations between neighboring magnetic ions in a transition-metal oxide system. We discuss the role of antisite (Ni-Mn) disorder in emergence of these unusual properties.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Chemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 17 Apr 2012 11:27
Last Modified: 17 Apr 2012 11:27
URI: http://eprints.iisc.ernet.in/id/eprint/44249

Actions (login required)

View Item View Item