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Title: Magnetic, dielectric and magnetodielectric properties of PVDF-La{sub 0.7}Sr{sub 0.3}MnO{sub 3} polymer nanocomposite film

We have investigated the structure, magnetic and dielectric properties of PVDF-La{sub 0.7}Sr{sub 0.3}MnO{sub 3} polymer nanocomposite thick film fabricated by dip coating technique along with the magnetodielectric effect. The structure and dielectric properties show the enhanced β phase in the composite compared to the PVDF film. The coupling between the ferroelectric and magnetic phases in the composite is revealed in the form of dielectric anomaly at the ferromagnetic Curie temperature. We observed 1.9% magnetodielectric effect at 300 K with the possibility of enhanced effect near the transition temperature. In addition, the analysis of the electric modulus indicates that the composite exhibits interfacial related relaxation and it follows Arrhenius Law. Our study suggests that the ac conductivity of the PVDF-La{sub 0.7}Sr{sub 0.3}MnO{sub 3} composite could be explained by correlated barrier hopping mechanism.
Authors:
; ; ;  [1]
  1. Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India)
Publication Date:
OSTI Identifier:
22251952
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 3; Journal Issue: 11; Other Information: (c) 2013 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; DIELECTRIC PROPERTIES; DIP COATING; FERROELECTRIC MATERIALS; FILMS; ORGANIC FLUORINE COMPOUNDS; POLYVINYLS; RELAXATION