Competitive coexistence of ferromagnetism and metal--insulator transition of VO\(_2\) nanoparticles

We investigated the magnetic and electric properties of nanometer-sized vanadium dioxide (VO\(_2\)) particles. VO\(_2\) nanoparticles were formed by milling VO\(_2\) powder. We measured the magnetic field dependence of the magnetization of the VO\(_2\) powder and nanoparticles. The VO\(_2\) powder d...

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Bibliographic Details
Published in:arXiv.org 2024-04
Main Authors: Hatano, Tsuyoshi, Fukawa, Akihiro, Yamamoto, Hiroki, Akiba, Keiichirou, Takase, Kouichi
Format: Article
Language:English
Subjects:
Ferromagnetism
Insulators
Magnetic properties
Metal-insulator transition
Nanoparticles
Size effects
Temperature dependence
Vanadium dioxide
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Summary:We investigated the magnetic and electric properties of nanometer-sized vanadium dioxide (VO\(_2\)) particles. VO\(_2\) nanoparticles were formed by milling VO\(_2\) powder. We measured the magnetic field dependence of the magnetization of the VO\(_2\) powder and nanoparticles. The VO\(_2\) powder did not exhibit ferromagnetism, whereas the VO\(_2\) nanoparticles exhibited ferromagnetism. In addition, we fabricated samples by bridging between electrodes with the VO\(_2\) 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 VO\(_2\). The VO\(_2\) nanoparticles exhibited these properties of ferromagnetism and MIT possibly because of the surface and size effects of the VO\(_2\) nanoparticles. These results indicate the first observation of the competitive coexistence of ferromagnetism and MIT of VO\(_2\) nanoparticles.
ISSN:2331-8422
DOI:10.48550/arxiv.2404.03207