About this Journal Submit a Manuscript Table of Contents
ISRN Materials Science
Volume 2011 (2011), Article ID 142968, 5 pages
http://dx.doi.org/10.5402/2011/142968
Research Article

Ferroelectric and Magnetic Properties of Hot-Pressed BiFeO3-PVDF Composite Films

1Ferroelectric Material and Devices Research Laboratory, Department of Physics, Indian Institute of Technology, Roorkee 247667, India
2Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
3Applied Physics and Materials Science Laboratory, Department of Applied Sciences, Baba Farid College of Engineering and Technology, Bathinda, Punjab 151001, India
4Materials Science Laboratory, Department of Applied Sciences, Giani Zail Singh College of Engineering and Technology, Bathinda 151001, Punjab, India
5Radio Frequency Integrated Circuits Research Laboratory, Department of Electronics and Computer Engineering, Indian Institute of Technology, Roorkee 247667, India

Received 3 April 2011; Accepted 25 April 2011

Academic Editors: J. M. Rincon and J. Spim

Copyright © 2011 Annapu V. Reddy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The ferroelectric and magnetic properties of hot-pressed BiFeO3- (BFO) polyvinylidene fluoride (PVDF) composite films have been studied. The BiFeO3 (BFO) ceramics have been synthesized by a rapid liquid phase sintering technique. The X-ray diffraction (XRD) studies revealed that the impure phase observed in pure BFO ceramics was significantly reduced in the composite films. The presence of both ferroelectric and magnetic hysteresis loops confirms the multiferroic nature of the composite films at room temperature. A well-saturated ferroelectric hysteresis loop with a remanent polarization ( 𝑃 π‘Ÿ ) ∼ 4 . 8 μC-cm−2 and coercive field ( 𝐸 𝑐 ) ∼ 1 . 5 5  kV/cm has been observed in composite thin films at room temperature. The magnetic hysteresis loops were traced at room temperature with SQUID. The remanent magnetization ( 𝑀 π‘Ÿ ) ∼ 3 . 0 Γ— 1 0 βˆ’ 3  emu/gm and coercive field ( 𝐻 𝑐 ) ∼ 0 . 9 9  kOe was observed in the composite film. The magnetic polarization of the composite films has found to be enhanced as compared to pure BFO and correlated to reduction in BFO impure peak intensity.