Giant Magnetodielectric Effect in 0-3 Ni0.5Zn0.5Fe2O4-Poly(vinylidene-fluoride) Nanocomposite Films

Authors

Yiping Guo, The Australian National University, Canberra
Yun Liu, The Australian National University, Canberra
Jianli Wang, University of New South WalesFollow
R. L. Withers, The Australian National University, Canberra
Hua Chen, Centre for Advanced Microscopy, The Australian National University.
Lu Jin, The Australian National University
Paul Smith, The Australian National University

RIS ID

40150

Publication Details

Guo, Y., Liu, Y., Wang, J., Withers, R. L., Chen, H., Jin, L. & Smith, P. (2010). Giant Magnetodielectric Effect in 0-3 Ni_0.5Zn_0.5Fe₂O₄-Poly(vinylidene-fluoride) Nanocomposite Films. The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, 114 (32), 13861-13866.

Abstract

Multiferroic nanocomposite films, composed of well-dispersed, magnetic Ni_0.5Zn_0.5Fe₂O₄ (NZFO) nanoparticles (in the size range 10−20 nm) embedded into a poly(vinylidene-fluoride) copolymer matrix host, have been prepared by a modified polymer processing route. The dielectric, ferroelectric, ferromagnetic and magnetodielectric properties of these nanocomposite films have been systematically investigated. The nanocomposite films exhibit low dielectric loss and good ferroelectric character. The magnetodielectric coefficient of the resultant nanocomposite films increases as a function of the NZFO fraction and is almost frequency independent. A giant magnetodielectric coefficient up to 5.1% was obtained at room temperature and under a low magnetic field of 0.3 T. The giant magnetodielectric effect together with low dielectric loss suggests the nanocomposite NZFO films are promising for use in smart multiferroic devices.