Realization of biferroic properties in $La_{0.6}Sr_{0.4}MnO_3 /0.7Pb(Mg_{1/3}Nb_{2/3})O_3–0.3(PbTiO_3)$ epitaxial superlattices

Chaudhuri, Ayan Roy and Ranjith, R and Krupanidhi, SB and Mangalam, RVK and Sundaresan, A and Majumdar, S and Ray, SK (2007) Realization of biferroic properties in $La_{0.6}Sr_{0.4}MnO_3 /0.7Pb(Mg_{1/3}Nb_{2/3})O_3–0.3(PbTiO_3)$ epitaxial superlattices. In: Journal of Applied Physics, 101 (11). pp. 114104-114109.

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Abstract

A set of symmetric and asymmetric superlattices with ferromagnetic $La_{0.6}Sr_{0.4}MnO_3$ (LSMO) and ferroelectric $0.7Pb(Mg_{1/3}Nb_{2/3})O_3–0.3(PbTiO_3)$ as the constituting layers was fabricated on $LaNiO_3$ coated 100 oriented $LaAlO_3$ substrates using pulsed laser ablation. The crystallinity, and magnetic and ferroelectric properties were studied for all the superlattices. All the superlattice structures exhibited a ferromagnetic behavior over a wide range of temperatures between 10 and 300 K, whereas only the asymmetric superlattices exhibited a reasonably good ferroelectric behavior. Strong influence of an applied magnetic field was observed on the ferroelectric properties of the asymmetric superlattices. Studies were conducted toward understanding the influence of conducting LSMO layers on the electrical responses of the heterostructures. The absence of ferroelectricity in the symmetric superlattice structures has been attributed to their high leakage characteristics. The effect of an applied magnetic field on the ferroelectric properties of the asymmetric superlattices indicated strong influence of the interfaces on the properties. The dominance of the interface on the dielectric response was confirmed by the observed Maxwell-Wagner-type dielectric relaxation in these heterostructures.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Keywords:	lanthanum compounds;strontium compounds;lead compounds;epitaxial layers;magnetic multilayers;superlattices;ferromagnetic materials;ferroelectric thin films;leakage currents;dielectric relaxation;dielectric polarisation
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	07 Sep 2007
Last Modified:	19 Sep 2010 04:39
URI:	http://eprints.iisc.ac.in/id/eprint/11815

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