| 초록 |
Two-phase magnetoelectric (ME) composites consisting of piezoelectric and magnetostrictive materials have been developed with strong attention for potential applications such as energy harvesters, sensors, memory devices even drug-delivery systems. In order to get a high feasibility of ME composites, ME thin films with one-dimensional (1D) piezoelectric nanostructures have been approached to minimize clamping effect from a rigid substrate, which is a dominant factor resulting in a low ME voltage. In this study, we have developed ME thin films via coating of TiOx@CoFe2O4 core-shell nanoparticles onto 1D BaTiO3 nanotubes. The 1D BaTiO3 nanotubes were synthesized as a piezoelectric matrix by Ti anodizing and post topochemical conversion. The TiOx@CoFe2O4 nanoparticles as an insulated magnetostrictive phase were synthesized by hydrothermal method and then were coated onto 1D BaTiO3 nanotubes. |
