Verma, Kuldeep Chand and Kotnala, R. K. and Negi, N. S. (2009) Intrinsic study for magnetoelectric coupling in Pb1-xSrx(Fe0.012Ti0.988)O-3 nanoparticles. Solid State Communications, 149 (41-42). pp. 1743-1748. ISSN 0038-1098

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Abstract

Intrinsic magnetoelectric (ME) coupling due to anomal phase transition temperature of multiferroic Pb1−xSrx(Fe0.012Ti0.988)O3 (PSFT) has been studied. The average particle size of PSFT specimens was measured from X-ray diffraction peaks and scanning electron microscopy. The ferromagnetic phase transition temperature (Tpm) was evaluated by temperature dependent heat flow, initial permeability (μi) and magnetic susceptibility (χ). However, ferroelectric phase transition temperature (Tpe) was observed from temperature dependent relative permittivity (ε), and dc resistivity (ρdc). The doping of Fe in PbTiO3 (PSFT0) has greatly reduced Tpe, while the doping of Sr in PSFT0 has reduced Tpm. The higher frequency dependent dielectric constant is explained in terms of higher dc resistivity of the PSFT nanoparticles involving Variable-Range-Hopping (VRH) conduction. The observed VRH mechanism shows low value of activation energy (i.e., in the order of meV) of fermi gap giving large ME output.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	06 Sep 2012 08:04
Last Modified:	06 Sep 2012 08:04
URI:	http://npl.csircentral.net/id/eprint/544

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