Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 26, 2022 - September 28, 2022
Magnetic sensors, angle sensors, energy harvesters, etc. have been developed using the transverse magnetoelectric(ME) constant, but in general, the transverse ME constant is one order of magnitude smaller than the longitudinal ME constant. Therefore, it is necessary to design and develop a heterostructure that is as effective as the longitudinal ME constant. In this study, multiscale optimal design was performed to find microscopic heterostructures that maximize the macroscopic ME effect. Asymptotic homogenization theory was employed in the scale coupling, and the microheterostructure was searched for by using the content ratio, arrangement, and polarization orientation of the constituent materials as design variables. As a result, in the case of barium titanium(BTO) for ferroelectric phase and cobalt ferrite(CFO) for ferromagnetic phase, the transverse ME constant a31 was 75.9 nNS/VC, which was a dramatic improvement over the conventional stacking structure.
