Giant sharp converse magnetoelectric effect from the combination of a piezoelectric transformer with a piezoelectric/magnetostrictive laminated composite

Yaojin Wang; Feifei Wang; Siu Wing Or; Helen Lai Wa Chan; Xiangyong Zhao; Haosu Luo
September 2008
Applied Physics Letters;9/15/2008, Vol. 93 Issue 11, p113503
Academic Journal
Giant sharp converse magnetoelectric (CME) coefficient of 11.9 G/V is obtained in a heterostructure formed by combining a Rosen-type 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 (PMN-PT) piezoelectric single-crystal transformer with a CME laminated composite of a length-magnetized Tb0.3Dy0.7Fe1.92 (Terfenol-D) magnetostrictive alloy plate sandwiched between two thickness-polarized, electroparallel-connected PMN-PT piezoelectric single-crystal plates. The observed giant sharp CME is found to originate from the step-up voltage-gain effect in the transformer and the resonance CME effect in the laminated composite. This heterostructure has promising applications in electrically controlled magnetic memory devices.


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