TITLE

Enhanced magnetoelectric effect in heterostructure of magnetostrictive alloy bars and piezoelectric single-crystal transformer

AUTHOR(S)
Leung, Chung Ming; Or, Siu Wing; Wang, Feifei; Ho, S. L.; Luo, Haosu
PUB. DATE
January 2011
SOURCE
Review of Scientific Instruments;Jan2011, Vol. 82 Issue 1, p013903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report an enhanced magnetoelectric (ME) effect in a heterostructure consisting of a long-type, longitudinally-longitudinally polarized 0.71Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 (PMN-PT) piezoelectric single-crystal transformer with its input part sandwiched between two longitudinally magnetized Tb0.3Dy0.7Fe1.92 (Terfenol-D) magnetostrictive alloy bars. The observed ME effect has two independent operational modes: namely, ME sensing mode and ME transduction mode. The ME sensing mode features a large ME voltage coefficient (αV) of ∼0.32 V/Oe over a flat frequency range of 1-50 kHz, while the ME transduction mode possesses two colossal resonance αV of 7.6 and 7.9 V/Oe, corresponding to the first and second longitudinal resonances, at 56.2 and 127.9 kHz, respectively. This enhanced dual-mode ME effect not only enables the application potential of the heterostructure, but also advances the technology of power-free ME sensors and transducers.
ACCESSION #
57679740

 

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