Pan Dean

Magnetoelectric cylindrical layered composite structure with multi-resonance frequencies

A combined ME composite structure is made of several cylindrical layered composites in series or parallel connection. Due to the cylindrical structure, the combined structure does not need more space. The characteristics of multi-resonance frequencies have been studied. Each resonance frequency of the structure can be adjusted by changing the cylinder diameter of the corresponding cylindrical layered composites. The number of resonance frequencies increases as the number of cylindrical layered composites increases. The multi-resonance frequencies behavior makes these cylindrical layered composite structures suitable for applications in multifuctional devices with multi-frequencies operation.

Current?voltage characteristics of lead zirconate titanate/nickel bilayered hollow cylindrical magnetoelectric composites

Current–voltage measurements obtained from lead zirconate titanate/nickel bilayered hollow cylindrical magnetoelectric composite showed that a sinusoidal current applied to the copper coil wrapped around the hollow cylinder circumference induces voltage across the lead zirconate titanate layer thickness. The current–voltage coefficient and the maximum induced voltage in lead zirconate titanate at 1 kHz and resonance (60.1 kHz) frequencies increased linearly with the number of the coil turns and the applied current. The resonance frequency corresponds to the electromechanical resonance frequency. The current–voltage coefficient can be significantly improved by optimizing the magnetoelectric structure geometry and/or increasing the number of coil turns. Hollow cylindrical lead zirconate titanate/nickel structures can be potentially used as current sensors.