Sharma, Anshu and Kotnala, R. K. and Negi, N. S. (2014) Observation of multiferroic properties and magnetoelectric effect in (x) CoFe2O4 -(1-x) Pb0.7Ca0.3TiO3 composites. Journal of Alloys and Compounds, 582. 628-634 . ISSN 0925-8388

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Abstract

(x)CoFe2O4-(1 - x) Pb0.7Ca0.3TiO3 (CFO-PCT) magnetoelectric composites with x = 0.2, 0.4, 0.6 and 0.8 were synthesized using metallo-organic decomposition (MOD) chemical method. The structural, microstructural, dielectric, ferroelectric, magnetic and magnetoelectric properties of these composites were investigated. The structural and microstructural results indicate that CFO and PCT phases can coexist in the composite without any secondary phase. The dielectric constant and loss factor of the composites were studied as a function of frequency and temperature. The temperature dependent dielectric properties show two dielectric maxima one at below similar to 385 degrees C and another at above similar to 510 degrees C. The dielectric anomaly below 385 degrees C and that above 510 degrees C correspond to the transitions of ferroelectric and ferrite respectively of the magnetoelectric composites. The composites show both ferroelectric and ferromagnetic behaviors at room temperature with strong dependence on ferrite concentration. The magnetoelectric voltage coefficient increases linearly with increase in applied dc magnetic-bias field up to 8 kOe. The maximum value of the magnetoelectric (ME) voltage coefficient alpha similar to 86 mV/cm Oe was measured for CFO-PCT composite having 80% ferrite content. The high ME voltage coefficient of CFO-PCT composites may be suitable for storage device applications.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier.
Uncontrolled Keywords:	Ceramics Chemical synthesis Multiferroic and magnetoelectric properties
Subjects:	Chemistry Materials Science Metallurgy & Metallurgical Engineering
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	29 Oct 2015 11:06
Last Modified:	29 Oct 2015 11:06
URI:	http://npl.csircentral.net/id/eprint/1445

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