An Improved Magnetic Field Detection Unit Based On Length-Magnetized Terfenol-D And Width-Polarized Ternary 0.35pb(In1/2nb1/2)O-3-0.35pb (Mg1/3nb2/3)O-3-0.30pbtio(3)

A magnetoelectric laminate composite based on length-magnetized Terfenol-D alloy and width-polarized ternary 0.35Pb(In1/2Nb1/2)O-3-0.35Pb(Mg1/3Nb2/3)O-3-0.30PbTiO(3) single crystal has been developed and exhibits a giant magnetoelectric voltage coefficient of 1.7 V/Oe at low frequencies and 20 V/Oe at resonance frequency 84 020 Hz besides showing good linearity range of response in the field range of 1 pT-10 mu T. Due to its small capacitance of 43 pF, a specially designed low-noise voltage follower was used to match the impedance. Based on the circuit, the detection limit of composite has been reached 1.9 pT/Hz(1/2) at 1020 Hz and 300 fT/Hz(1/2) at 84 020Hz, respectively. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769904]