Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32763
Title: Large magnetoelectric effect from mechanically mediated magnetic field-induced strain effect in Ni-Mn-Ga single crystal and piezoelectric effect in PVDF polymer
Authors: Zeng, M
Or, SW 
Chan, HLW 
Keywords: Composite
Ferromagnetic shape memory alloy
Magnetic field-induced strain
Magnetoelectric effect
Piezoelectric polymer
Single crystal
Issue Date: 2010
Publisher: Elsevier
Source: Journal of alloys and compounds, 2010, v. 490, no. 1-2, p. l5-l8 How to cite?
Journal: Journal of alloys and compounds 
Abstract: Magnetoelectric (ME) effect is observed in a bilayered composite fabricated by laminating one ferromagnetic shape memory Ni-Mn-Ga single-crystal plate with one piezoelectric PVDF polymer film. The reported ME effect originates from the mechanically mediated magnetic field-induced strain effect in the Ni-Mn-Ga plate and piezoelectric effect in the PVDF film. The induced ME voltage shows a good linear response to the applied ac magnetic field in the field range of 0-5 Oe. A large ME coefficient (α E) of 1.24 V/(cm Oe) is obtained at an optimal bias magnetic field of 5.1 kOe due to the reversible reorientation of martensitic twin variants in the Ni-Mn-Ga plate. Based on the combination of pseudo-piezomagnetism in the Ni-Mn-Ga plate and piezoelectricity in the PVDF film, the ME effect in the bilayered composite is predicted and found to agree with the experimental results.
URI: http://hdl.handle.net/10397/32763
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2009.09.167
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