R&D: Single or Vortex Ferroelectric and Ferromagnetic Domain Nanodot Array of Magnetoelectric BiFe0.9Co0.1O3
Nanodots composed of multiferroic cobalt-substituted BiFeO3, ferroelectric ferromagnet at room temperature, are fabricated by pulsed laser deposition using anodized porous alumina as masks.
This is a Press Release edited by StorageNewsletter.com on July 11, 2024 at 2:00 pmACS Applied Materials & Interfaces has published an article written by Keita Ozawa, Yasuhito Nagase, Marin Katsumata, Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8501, Japan, Kei Shigematsu, Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8501, Japan, Kanagawa Institute of Industrial Science and Technology (KISTEC), Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan, and Sumitomo Chemical Next-Generation Eco-Friendly Devices Collaborative Research Cluster, Tokyo Institute of Technology, Yokohama 226-8501, Japan, and Masaki Azuma, Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8501, Japan, Kanagawa Institute of Industrial Science and Technology (KISTEC), Shimoimaizumi, Ebina, Kanagawa 243-0435, Japan, Sumitomo Chemical Next-Generation Eco-Friendly Devices Collaborative Research Cluster, Tokyo Institute of Technology, Yokohama 226-8501, Japan, and Living Systems Materialogy (LiSM) Research Group, International Research Frontiers Initiative (IRFI), Tokyo Institute of Technology, Yokohama 226-8501, Japan.
Abstract: “Nanodots composed of multiferroic cobalt-substituted BiFeO3, a ferroelectric ferromagnet at room temperature, are fabricated by pulsed laser deposition using anodized porous alumina as masks. The obtained nanodots are approximately 60 nm in diameter, more than 10 nm in thickness, and approximately 70 Gbit/in.2 in density. Piezoresponse and magnetic force microscopies show both ferroelectricity and ferromagnetism with a single-domain nature. It is also 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 are suitable for verifying magnetization reversal by the electric field, which is the first step in the development of low-power-consumption nonvolatile magnetic memory devices.“
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