電気磁気高分子複合材料のマルチスケール特性評価と設計

抄録

Multiferroic composites consisting of ferroelectric and ferromagnetic materials are attracting attention as a breakthrough functional material for the development of innovative devices because of their ability to produce magnetoelectric (ME) effect through mechanical strain transfer in heterostructures. In recent years, the development of polymer composites with piezoelectric (PE) and piezomagnetic (PM) particles dispersed in thermoplastic polymers as matrix has been active, with potential applications in wearable or printable devices. However, the presence of polymers in the strain transfer between PE and PM particles significantly reduces their electromagnetic properties. In this study, we applied the periodic polarization inversion structure, which was discovered by multiscale optimal design of ME ceramic composites, to PE and PM particle-dispersed polymer composites. As a result, it was found that the periodic polarization inversion structure is effective for PE and PM particle-dispersed polymer composites, and improves the transverse ME effect by a factor of 8.3 compared with the conventional stacking structure.