Abstract
In this work, a multi-terminal hexagonal-framed magnetoelectric composite (HFMEC) made of amorphous FeBSi alloy (Metglas) ribbons and three sandwiched [011]-oriented PMN-PT single-crystal fibers (Pb(Mg1/3Nb2/3)O3-PbTiO3) arranged with a 120° interval is presented, and the directional magnetoelectric (ME) effect of the HFMEC operating in the L-T mode under a constant-amplitude AC magnetic field is investigated. It is found that the HFMEC exhibits threefold symmetric directional ME coupling in response to an applied in-plane DC magnetic field HDC, while each ME terminal shows a twofold symmetry due to the magnetization and demagnetization effect of HDC. Moreover, a valid formula for calculating the angular direction of the magnetic field is also presented. It is further revealed that the HFMEC exhibits a “V” shaped ME voltage output as a response to HDC due to the geomagnetic field (HGeo) effect, and the knee point of the curve literally reveals the magnitude of local HGeo, while the direction of HDC indicates a reverse direction of HGeo. The proposed HFMEC provides a great potential for a vector magnetometer as well as geomagnetic sensor application.
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