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Engineered Biferroic 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3/La0.6Sr0.4MnO3 Epitaxial Superlattices

Published online by Cambridge University Press:  01 February 2011

Ayan Roy Chaudhuri  and
S.B. Krupanidhi
Ayan Roy Chaudhuri
Affiliation:
ayanroychaudhuri@gmail.com, Indian Institute of Science, Materials Research Centre, Sir C.V. Raman Avenue, Bangalore, 560012, India, +9180 2293 2601, +9180 2360 7316
S.B. Krupanidhi
Affiliation:
sbk@mrc.iisc.ernet.in, Indian Institute of Science, Materials Research Centre, Sir C.V. Raman Avenue, Bangalore, 560012, India
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Abstract

Symmetric and asymmetric superlattices (SLs) composed of ferromagnetic La0.6Sr0.4MnO3 (LSMO) and ferroelectric 0.7Pb(Mg1/3Nb2/3)O3 – 0.3PbTiO3 (PMN-PT) with different periodicities have been fabricated on LaNiO3 (LNO) coated LaAlO3 (100) (LAO) substrates by pulsed laser ablation deposition. Structural, ferromagnetic and ferroelectric properties have been studied for all the SLs. All the heterostructures exhibited good ferromagnetic response over a wide range of temperatures (10K – 300K), whereas only the asymmetric SLs exhibited reasonably good ferroelectric behaviour. Ferromagnetic and ferroelectric hysteresis loops observed in the asymmetric SLs confirmed their biferroic nature. Studies were conducted towards understanding the influence of LSMO layers on the electrical responses of the heterostructures. Absence of ferroelectricity in the symmetric SL structures has been attributed to their high leakage characteristics. Strong influence of an applied magnetic field of 1.2T was observed on the ferroelectric properties of the asymmetric SLs. The effect of magnetic field on the ferroelectric properties of the SLs indicated possibility of strong interfacial effect.

Keywords

ferroelectricferromagneticepitaxy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1034 , 2007 , 1034-K03-37
Copyright
Copyright © Materials Research Society 2008

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