Extremely low frequency response of magnetoelectric multilayer composites

Dong, Shuxiang; Zhai, Junyi; Xing, Zhengping; Li, Jie-Fang; Viehland, D.
March 2005
Applied Physics Letters;3/7/2005, Vol. 86 Issue 10, p102901
Academic Journal
A promising generation of extremely low frequency magnetic field sensors, based on multilayer composites (MLCs) of magnetostrictive Terfenol-D (Tb1-xDyxFe2-y) and piezoelectric Pb(Mg1/3Nb2/3)O3–PbTiO3, has been developed. Our MLC magnetoelectric sensor presently shows a limit in (i) working frequency of ∼5×10-3 Hz; and (ii) magnetic field sensitivity of 10-7, 10-9, and 10-11 T for frequencies of f=10-2, 1, and 102 Hz, respectively. The results open up possibilities for sensitive low frequency passive magnetic anomaly detection.


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