Abstract
Laminated magnetoelectric (ME) composites are suitable for applications such as magnetic field sensors, transformers, and microwave resonators. Such applications frequently involve environments where the temperature alters. The present work investigates the temperature dependent ME coupling for three kinds of laminates, namely, Terfenol-D/PZT/Terfenol-D, Ni/PZT/Ni, and Metglas/PZT/Metglas. The Terfenol-D/PZT/Terfenol-D is shown to exhibit the best temperature stability. The peak value of the ME coefficient versus temperature curve is predicted for the laminates based on the equivalent circuit model, as well as the measurements of temperature dependent magnetostriction for Terfenol-D, Ni, and Metglas. The predictions agree well with the experimental data, implying that the piezomagnetic coefficient, d11,m, of the magnetic layer plays an important role in the temperature dependent ME coupling of the laminate.
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