Studies on Local Structural Inhomogeneity and Origin of Ferroelectricity in Yttrium chromite Ceramics

Mannepalli, Venkateswara Rao and Ramadurai, Ranjit (2016) Studies on Local Structural Inhomogeneity and Origin of Ferroelectricity in Yttrium chromite Ceramics. MRS Advances, 1 (9). pp. 609-614. ISSN 2059-8521

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Abstract

YCrO3 (YCO) is known to be a multiferroic with orthorhombic, Pnma, structure with center of inversion. However, the local structural inhomogeneity in this compound is believed to give rise to ferroelectric behavior. In this study we explore high temperature Raman investigations of YCO and observed that one of its Raman mode B3g (3) (CrO6 Octahedral tilt mode) softens around the structural phase transition which could be the origin of ferroelectric nature in YCO. In addition, we substitute bismuth (Bi) in YCO to understand the structural distortions that lead to local structural inhomogeneity. Besides B3g (3) mode softening with composition and high temperature studies in Y1-xBixCrO3 the study reveals the structural distortions and the structural tunability Bi offers in such systems.

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IITH Creators:	IITH Creators ORCiD Ramadurai, Ranjit http://orcid.org/0000-0003-2991-0027
Item Type:	Article
Uncontrolled Keywords:	Raman spectroscopy; ferroelectricity; chemical substitution
Subjects:	Others > Metallurgy Materials Engineering > Materials engineering
Divisions:	Department of Material Science Engineering
Depositing User:	Team Library
Date Deposited:	26 Apr 2016 07:01
Last Modified:	20 Sep 2017 07:16
URI:	http://raiithold.iith.ac.in/id/eprint/2294
Publisher URL:	https://doi.org/10.1557/adv.2016.222
Related URLs:	Google Scholar

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