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A New Method to Increase the Magnetoelectric Voltage Coefficients of Metglas/PVDF Laminate Composites

Published online by Cambridge University Press:  31 January 2011

Zhao Fang ,
David Sheng-Guo Lu ,
Ninad Mokhariwale ,
Mario Remond El Tahchi  and
Qiming Zhang
Zhao Fang
Affiliation:
zuf101@psu.edu, The Pennsylvania State University, Electrical Engineering, University Park, Pennsylvania, United States
David Sheng-Guo Lu
Affiliation:
sul26@psu.edusglu_hk@hotmail.com, The Pennsylvania State University, Materials Research Institute, RUA 105 Materials Research Laboratory Building, University Park, Pennsylvania, 16802, United States, 814-863-1006, 814-863-7846
Ninad Mokhariwale
Affiliation:
nmm229@psu.edu, The Pennsylvania State University, Electrical Engineering, University Park, Pennsylvania, United States
Mario Remond El Tahchi
Affiliation:
mtahchi@ul.edu.lb, Lebanese University, Physics, Jdeidet, Lebanon
Qiming Zhang
Affiliation:
qxz1@psu.edu, The Pennsylvania State University, Electrical Engineering, University Park, Pennsylvania, United States
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Abstract

The magnetic flux density inside a Metglas sheet is much higher than that of the applied external magnetic field due to its high magnetic permeability, which is known as the magnetic flux concentration effect. Magnetic flux concentration of Metglas as a function of its sheet aspect ratio (width/length) was investigated for Metglas/Polyvinylidene fluoride (PVDF) laminar composites. Both the simulations and experimental results suggest that the magnetic flux concentration effect is markedly enhanced when the aspect ratio of a Metglas sheet is reduced. Consequently the magnetostriction of Metglas and the magnetoelectric (ME) voltage coefficients of the laminar composites are enhanced. The ME voltage coefficient for a laminar composite with a 1 mm wide and 30 mm long Metglas sheet (25 μm thick) is 21.46 V/cm•Oe, which is much higher than those reported earlier in similar laminar composites without making use of the flux concentration effect. The results demonstrate an effective means to significantly enhance the sensitivity of the magnetostrictive/piezoelectric composites as weak magnetic field sensors.

Keywords

sensormagneticpiezoelectric
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1199: Symposium F –Multiferroic and Ferroelectric Materials , 2009 , 1199-F06-08
Copyright
Copyright © Materials Research Society 2010

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