Influences of the shape of magnetic material on the magnetoelectric properties of the PZT/Metglas composite

Abstract

In this paper, the influences of the shape of magnetic material on the magnetoelectric (ME) properties of PZT/Metglas magnetoelectric (ME) composites have been investigated. The results indicate that, with the decrease of the waist length (L w) of the dumbbell-shaped Metglas, the magnetic flux density in the center region and ME coefficients(α ME) of the composites increase, while the optimal bias magnetic field H dc decreases on the contrary. In an AC magnetic field of 1 kHz, the maximum α ME (α Max) of the composite with L w= 20 mm exhibits 1.3 times larger than that of the one with L w=50 mm, and the optimal H dc deceases by 15%. At the resonant frequencies of each composites, α Max is enhanced by 1.3 times as L w decreases from 50 to 20 mm. The simulation made by Comsol Multiphysics and the theoretical analysis based on an equivalent magnetic circuit confirm the experimental results.