title: Investigation of optimized end-bonding magnetoelectric heterostructure for sensitive magnetic field sensor.
abstract: This paper reports an optimized end-bonding magnetoelectric (ME) heterostructure FeCuNbSiB-PZT-FeCuNbSiB (FPF) for sensitive magnetic field sensor. The heterostructure is made by attaching magnetostrictive Fe73.5Cu1Nb3Si13.5B9 (FeCuNbSiB) foils at the free ends of piezoelectric Pb(Zr1-x,Tix)O3 (PZT) plates. Due to the structural advantages, the FPF has ∼3.12 times larger resonance voltage coefficient (αME,r) than traditional FeCuNbSiB/PZT laminate. And compared with the Metglas-PZT-Metglas heterostructure, the FPF heterostructure has stronger ME responses for the excellent magnetic characteristics of FeCuNbSiB. In experiments, the FPF heterostructure is optimal designed through adjusting the thickness of PZT plate (tp) and the length of FeCuNbSiB foil (L). The results demonstrate that the maximum αME,r of 662.1 (V/cm Oe) is observed at 13 Oe DC bias magnetic field when L = 15 mm and tp = 0.6 mm. Based on the giant ME coupling, the DC magnetic field sensitivity for the optimized FPF heterostructure is 3.89 nT at resonant frequency. These results are very promising for the cheap room-temperature magnetic field sensing technology.
authors.affiliation: Guizhou Electric Power Test Research Institute, China Southern Power Grid, Guiyang 550002, China.
authors.forename: Caijiang
authors.initials: C
authors.lastname: Lu
authors.affiliation: Guizhou Electric Power Test Research Institute, China Southern Power Grid, Guiyang 550002, China.
authors.forename: Changbao
authors.initials: C
authors.lastname: Xu
authors.affiliation: Nanyang Power Supply Bureau, State Grid Corporation of China, Nanyang 473000, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.affiliation: Guizhou Electric Power Test Research Institute, China Southern Power Grid, Guiyang 550002, China.
authors.forename: Jipu
authors.initials: J
authors.lastname: Gao
authors.affiliation: Guizhou Electric Power Test Research Institute, China Southern Power Grid, Guiyang 550002, China.
authors.forename: Junguo
authors.initials: J
authors.lastname: Gui
authors.affiliation: Guizhou Electric Power Test Research Institute, China Southern Power Grid, Guiyang 550002, China.
authors.forename: Chenghui
authors.initials: C
authors.lastname: Lin