Bi4Ti3O12-5BiFeO(3) Aurivillius intergrowth: Structural and ferroelectric properties

Preethi Meher, KRS and Varma, K.BR (2009) Bi4Ti3O12-5BiFeO(3) Aurivillius intergrowth: Structural and ferroelectric properties. In: Journal Of Applied Physics, 106 (12).

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Abstract

Aurivillus intergrowth Bi4Ti3O12-5BiFeO(3) was demonstrated to be ferroelectric that evoked the possibility of achieving high temperature magnetoelectric property in this family of compounds. X-ray diffraction studies confirmed its structure to be orthorhombic [Fmm2; a=5.5061(11) A degrees, b=5.4857(7) A degrees, c=65.742(12) A degrees]. However, transmission electron microscopy established the random incidence of intergrowth at nanoscale corresponding to n=6 and n=7 members of the Aurivillius family. Diffuse ferroelectric orthorhombic to paraelectric tetragonal phase transition around 857 K was confirmed by dielectric and high temperature x-ray diffraction studies. Polarization versus electric field hysteresis loops associated with 2P(r) of 5.2 mu C/cm(2) and coercive field of 42 kV/cm were obtained at 300 K.

Item Type:	Journal Article
Publication:	Journal Of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright for this article belongs to American Institute of Physics.
Keywords:	bismuth compounds; dielectric hysteresis; ferroelectric coercive field; ferroelectric transitions; magnetoelectric effects; transmission electron microscopy; X-ray diffraction
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	19 Jan 2010 09:06
Last Modified:	19 Sep 2010 05:54
URI:	http://eprints.iisc.ac.in/id/eprint/25432

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