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Field-induced phase transition and its impact on the magnetoelectric effect in P(VDF-HFP)/Metglas laminates

Published online by Cambridge University Press:  31 January 2011

David Sheng-Guo Lu ,
Xin Zhou ,
Zhao Fang  and
Qiming Zhang
David Sheng-Guo Lu
Affiliation:
[email protected][email protected], The Pennsylvania State University, Materials Research Institute, University Park, Pennsylvania, United States
Xin Zhou
Affiliation:
[email protected], The Pennsylvania State University, Materials Research Institute and Department of Electrical Engineering, University Park, Pennsylvania, United States
Zhao Fang
Affiliation:
[email protected], The Pennsylvania State University, Materials Research Institute and Deoartment of Electrical Engineering, University Park, Pennsylvania, United States
Qiming Zhang
Affiliation:
[email protected], The Pennsylvania State University, Materials Research Institute and Department of Electrical Engineering, University Park, Pennsylvania, United States
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Abstract

The field-induced phase transition driven by electric field was observed in poly(vinylidene fluoride – hexafluoropropylene) (P(VDF-HFP)) 90/10 wt% copolymers. Experimental results indicated that the electric field may remarkably affect the remanent polarization in terms of changing the D-E loop forms from double loops to single loop, starting from 68 MV/m, and completing at 216 MV/m. It was found that the remanent polarization as well as the piezoelectric constant d31 had a linear relationship with the poling electric field in above electric field range. Thus the magnetoelectric (ME) coupling coefficient ME in P(VDF-HFP)/Metglas laminates increased with the poling electric field. Moreover, the cyclic poled ME device demonstrated different peak d.c. magnetic bias field HDC on the ME - HDC curves from conventional room temperature poled ones. The peak ME coefficient obtained was 4 V/cm Oe.

Keywords

ferroelectricpolymermagnetic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1199: Symposium F –Multiferroic and Ferroelectric Materials , 2009 , 1199-F06-24
Copyright
Copyright © Materials Research Society 2010

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