Theoretical Studies of Magnetoelectric Enhancement in Bar-Shaped Laminate Based on Mechanical Connection and Equivalent Circuit Methods

The magnetoelectric (ME) laminated composite is an important multifunctional material for developing novel electronic devices that provide many applications in sensing, energy conversion, filtering, etc. Following the previous investigations, this paper proposes theoretical modeling to study the relationship between a bar-shaped ME laminated composite's enhancement effects and material properties. This composite has a breakthrough idea that produces two operating modes (sensing and transducing) in the same working process. Our analyses are based on the magneto-elastic-electric equivalent circuit and mechanical connections between an ME laminated composite and a piezoelectric plate. Our works not only predicted the ME outputs against magnetic field bias change but also studied the relationship of the length ratio between the ME laminated composite and the piezoelectric plate. The results showed that the ME outputs of the transduction mode are much bigger than the sensing mode at resonance, which strongly depended on the dimension and the physical properties of the sample. These findings provided a promising gate for the researchers to develop a single electronic device that combined sensing and power conversion.