Paul, Joginder and Bhardwaj, Sumit and Sharma, Kuldeep Kumar and Kotnala, Ravinder Kumar and Kumar, Ravi (2014) Room-temperature multiferroic properties and magnetoelectric coupling in Bi4-x Sm (x) Ti3-x Co (x) O12-delta ceramics. Journal of Materials Science, 49 (17). 6056 -6066. ISSN 0022-2461

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Abstract

We present the structural, dielectric, ferroelectric, magnetic and magnetoelectric studies of lead free; single phase Bi4-x Sm (x) Ti3-x Co (x) O12-delta (0 a parts per thousand currency sign x a parts per thousand currency sign 0.07) ceramics, synthesized using a standard solid-state reaction technique. Raman spectroscopy analysis reveals the relaxation of distortion in TiO6 octahedron. Field emission scanning electron microscopy confirmed the growth of plate-like grains. It is observed that with the substitution of Sm3+ and Co3+ ions the dielectric constant, loss tangent and ferroelectric transition temperature decreases. Electrical dc resistivity, remnant polarization and magnetization increases with increasing Sm3+ and Co3+ contents. The magnetoelectric coupling co-efficient, alpha = 0.65 mV cm(-1) Oe(-1) is realized for Bi4-x Sm (x) Ti3-x Co (x) O12-delta (x = 0.07) ceramic sample. Our results clearly demonstrate the lead free, multiferroic nature of Sm/Co-substituted Bi4Ti3O12, which may find useful application in designing cost-effective electromagnetic devices.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Springer Verlag.
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	04 Nov 2015 10:33
Last Modified:	04 Nov 2015 10:33
URI:	http://npl.csircentral.net/id/eprint/1508

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