Nanowerk  April 26, 2024 Researchers in Japan fabricated nanodots composed of multiferroic cobalt-substituted BiFeO3, a ferroelectric ferromagnet at room temperature, by pulsed laser deposition using anodized porous alumina as masks. The nanodots were approximately 60 nm in diameter, more than 10 nm in thickness, and approximately 70 Gbit/in.2 in density. They showed both ferroelectricity and ferromagnetism with a single-domain nature. They found that the dot with 190 nm diameter had multidomain vortex ferroelectric and magnetic structures indicating the strong magnetoelectric coupling. The single-domain cobalt-substituted BiFeO3 nanodots were suitable for verifying magnetization reversal by the electric field, which was the first […]