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|Title: ||Magnetic field-induced strain and magnetoelectric effects in sandwich composite of ferromagnetic shape memory Ni-Mn-Ga crystal and piezoelectric PVDF polymer|
|Authors: ||Zeng, Min|
Or, Derek Siu-wing
Chan, Helen L. W.
|Subjects: ||Composite materials|
Piezoelectric thin films
Shape memory effects
|Issue Date: ||Oct-2010 |
|Citation: ||IEEE transactions on ultrasonics, ferroelectrics, and frequency control, Oct. 2010, v. 57, no, 10, p. 2147-2153.|
|Abstract: ||A sandwich composite consisting of one layer of ferromagnetic shape memory Ni-Mn-Ga crystal plate bonded between two layers of piezoelectric PVDF polymer film was
fabricated, and its magnetic field-induced strain (MFIS) and magnetoelectric (ME) effects were investigated, together with
a monolithic Ni-Mn-Ga crystal, as functions of magnetic fields and mechanical load. The load-free dc- and ac-MFISs were 0.35 and 0.05% in the composite, and 5.6 and 0.3% in the monolithic crystal, respectively. The relatively smaller load-free MFISs in the composite than the monolithic crystal resulted from the clamping of martensitic twin-boundary motion in the Ni-Mn-Ga plate by the PVDF films. The largest ME coefficient (αE) was 0.58 V/cm·Oe at a magnetic bias field (H[sub Bias]) of 8.35 kOe under load-free condition. The mechanism of the ME effect originated from the mechanically mediated MFIS effect in the Ni-Mn-Ga plate and piezoelectric effect in the PVDF films. The measured αE–H[sub Bias] responses under different loads showed good agreement with the model prediction.|
|Description: ||DOI: 10.1109/TUFFC.2010.1671|
|Rights: ||© 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
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|Type: ||Journal/Magazine Article|
|Appears in Collections:||AP Journal/Magazine Articles|
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