%0 Journal Article
%@ 2468-2179
%A Trinh, Dinh Cuong
%A Nguyen, Viet Hung
%A Vu, Le Ha
%A Phung, Anh Tuan
%A Do, Dinh Duong
%A Ho, Anh Tam
%A Nguyen, Huu Duc
%A Do, Thi Huong Giang
%D 2020
%F SisLab:4089
%I Elsevier B.V
%J Journal of Science: Advanced Materials and Devices
%P 354-360
%T Giant magnetoelectric effects in serial-parallel connected Metglas/PZT arrays with magnetostrictively homogeneous laminates
%U https://eprints.uet.vnu.edu.vn/eprints/id/eprint/4089/
%V 5
%X To ensure the magnetostrictive softness, the homogeneity, the decrease of the shear-lag effect and the  space-saving construction of narrowed longitudinal-transverse L-T magnetoelectric (ME) composites, a  novel parallel-connected-multi-bars (PCMB) geometry of PZT/Metglas is proposed and investigated by  simulation and experiment. In this case, Metglas layers are structured in different geometries from the  conventional single bar (c-SB) to conventional separated multiple bars (c-SMB), elongated separate  multi-bar (e-SMB) and n-magnetic-bar based PCMB (n-PCMB). This n-PCMB geometry divides the conventional  ME configuration into n parallel-connected ME units (n-PCMEU) according to the magnetic  geometries. The optimal ME performance with the largest ME voltage coefficient aE of 630 V/cm.Oe is  achieved in PCMEU with two Metglas bars (n = 2). The ME voltage coefficient can be further enhanced by  integrating m of these optimal PCMEUs in series to form a serial-parallel ME unit array m-S (n-PMEU)A.  The aE value increases by a factor of 3.6 and reaches 2.238 kV/cm.Oe for 4-S (2-PMEU)A, a factor that is  almost equal to m. The resulting 4-S (2-PMEU)A sensor possesses an extremely high sensitivity of  18.1 mV/nT, with a resolution of 10�1 nT.