%A Dinh Cuong Trinh
%A Viet Hung Nguyen
%A Le Ha Vu
%A Anh Tuan Phung
%A Dinh Duong Do
%A Anh Tam Ho
%A Huu Duc Nguyen
%A Thi Huong Giang Do
%J Journal of Science: Advanced Materials and Devices
%T Giant magnetoelectric effects in serial-parallel connected Metglas/PZT arrays with magnetostrictively homogeneous laminates
%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.
%P 354-360
%V 5
%D 2020
%I Elsevier B.V
%L SisLab4089