Magnetoelectric nonlinearity in magnetoelectric laminate sensors

Liangguo Shen (1) , Menghui Li (1) , Junqi Gao (1) , Ying Shen (1) , J.F. Li (1) , D. Viehland (1) , Xin Zhuang (2) , Marc Lam Chok Sing (2) , Christophe Cordier (2) , Sébastien Saez (2) , Christophe Dolabdjian (2)

1 MSE - Department of Materials Science and Engineering [Blacksburg]
2 Equipe Electronique - Laboratoire GREYC - UMR6072

A nonlinearity in the magnetoelectric coefficient, aNonlin ME , of Metglas=Pb(Zr,Ti)O3 (PZT) and Metglas=Pb(Mg1=3,Nb2=3)O3-PbTiO3 (PMN-PT) laminate sensors has been observed. This nonlinearity was found to be dependent on the dc magnetic bias (Hdc) and frequency of the ac drive field (Hac). The maximum value of aNonlin ME for both types of composites was found near the electromechanical resonance. For Metglas=PZT laminates, the maximum occurred under a finite bias of Hdc 5 Oe; whereas, for Metglas=PMN-PT, the maximum was found near zero dc bias. One application for aNonlin ME is a cross-modulation scheme that can shift low frequency signals to higher frequency to achieve lower noise floor. For Metglas=PMN-PT, aNonlin ME has another application: removal of the necessity of a dc bias, which helps to design high-sensitivity sensor arrays and gradiometers.

Domaines: Sciences de l'ingénieur [physics]; Electromagnétisme

Liangguo Shen, Menghui Li, Junqi Gao, Ying Shen, J.F. Li, et al.. Magnetoelectric nonlinearity in magnetoelectric laminate sensors. Journal of Applied Physics, 2011, 110 (11), pp.114510-1/114510-6. ⟨hal-00987001⟩