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Experimental evidence of end effects in magneto-electric laminate composites

J. Appl. Phys. 102, 124901 (2007); doi:10.1063/1.2822455

Published 18 December 2007

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Chia-Ming Chang and Gregory P. Carman
Mechanical and Aerospace Engineering Department, University of California, Los Angeles, 420 Westwood Plaza, Los Angeles, California 90095, USA
This paper experimentally and theoretically studies the magneto-electric (M-E) responses of layered magnetostrictive and piezoelectric composites. A total of three different piezoelectric volume fractions of 0.17, 0.29, and 0.44 were prepared to investigate the strain variation in the sample and the effective M-E voltage coefficient [overline alpha ] as a function of bias magnetic field Hbias. Analytical modeling involving uniform strain, shear lag only, and shear lag plus demagnetization was performed and compared with experimental measurements. The results demonstrate that the uniform strain theory significantly overestimates the measured strain and [overline alpha ] values. This discrepancy is physically attributed to shear lag and demagnetizing effects. The analytical models involving shear lag and demagnetizing effects agree with the experimental results well within 5%. ©2007 American Institute of Physics
History: Received 13 July 2007; accepted 20 October 2007; published 18 December 2007
Permalink: http://link.aip.org/link/?JAPIAU/102/124901/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.70.Cn
    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)
  • 75.50.Cc
    Ferromagnetism of nonferrous metals and alloys
  • 75.60.-d
    Magnetic domain effects, magnetization curves, and hysteresis
  • 75.80.+q
    Magnetomechanical and magnetoelectric effects, magnetostriction
  • 77.65.-j
    Piezoelectricity and electromechanical effects
  • 77.84.Lf
    Dielectric, piezoelectric, and ferroelectric composite materials
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
Publisher:
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