Competitive coexistence of ferromagnetism and metal-insulator transition of VO2 nanoparticles

Tsuyoshi Hatano, Akihiro Fukawa, Hiroki Yamamoto, Keiichirou Akiba, Satoshi Demura, Kouichi Takase

Research output: Contribution to journalArticlepeer-review


We investigated the magnetic and electric properties of nanometer-sized vanadium dioxide (VO2) particles. VO2 nanoparticles were formed by milling VO2 powder. We measured the magnetic field dependence of the magnetization of the VO2 powder and nanoparticles. The VO2 powder did not exhibit ferromagnetism, whereas the VO2 nanoparticles exhibited ferromagnetism. In addition, we fabricated samples by bridging between electrodes with the VO2 nanoparticles, and the temperature dependence of their resistance was measured. Metal-insulator transitions (MITs) were observed, and the temperature range where the MIT occurred was wider than that in a typical bulk VO2. The VO2 nanoparticles exhibited these properties of ferromagnetism and MIT possibly because of the surface and size effects of the VO2 nanoparticles. These results indicate the first observation of the competitive coexistence of ferromagnetism and MIT of VO2 nanoparticles.

Original languageEnglish
Article number04SP07
JournalJapanese Journal of Applied Physics
Issue number4
Publication statusPublished - 1 Apr 2024


  • ferromagnetism
  • metal-insulator transition
  • vanadium dioxide nanoparticles


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