Giant magnetodielectric effect in 0-3 Ni 0.5 Zn 0.5 Fe 2 O 4 -poly(vinylidene-fluoride) nanocomposite films
Date
2010
Authors
Guo, Yiping
Liu, Yun
Wang, Jianli
Withers, Raymond
Chen, Hua
Jin, Lu
Smith, Paul
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American Chemical Society
Abstract
Multiferroic nanocomposite films, composed of well-dispersed, magnetic Ni0.5Zn0.5Fe2O4 (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.
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Keywords
Keywords: Copolymer matrix; Frequency independent; Low dielectric loss; Low magnetic fields; Magneto-dielectric effects; Magnetodielectric property; Magnetodielectrics; Modified polymer; Multiferroics; Nanocomposite film; Room temperature; Size ranges; Well-dispers
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Journal of Physical Chemistry C
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Journal article
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2037-12-31
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