15-Mode piezoelectric composite and its application in a magnetoelectric laminate structure

초록

Magnetoelectric composites have recently been attracting attention owing to their possible application in various advanced electronics. The piezoelectric material used in a magnetoelectric composite is an important determinant of the electrical performance of the device. In this study, we report on the fundamental characteristics and magnetoelectric application of a 15-mode piezoelectric composite. The centimeter-scale 15-mode piezoelectric composite implemented by a novel fabrication process exhibits successful 15-mode operation along with excellent piezoelectric properties d(15) = 793 x 10(-12)CN(-1), g(15) = 32 x 10(-3)VmN(-1), k(15) = 0.62, and d(15).g(15) = 25376 x 10(-15)m(2) N-1. Magnetostrictive-piezoelectric laminate structures designed to generate shear stress were fabricated using the 15-mode piezoelectric composites, and their magnetoelectric characteristics were investigated systematically. A giant magnetoelectric voltage coefficient of 18.4 V cm(-1) Oe(-1) was obtained at a low frequency of 660 Hz from the laminate, indicating the potential of the 15-mode piezoelectric composite for application in high-performance magnetoelectric devices. (C) 2018 Elsevier B.V. All rights reserved.

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