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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2404.03207 |
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| _version_ | 1866911827632324608 |
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| author | Hatano, Tsuyoshi Fukawa, Akihiro Yamamoto, Hiroki Akiba, Keiichirou Takase, Kouichi |
| author_facet | Hatano, Tsuyoshi Fukawa, Akihiro Yamamoto, Hiroki Akiba, Keiichirou Takase, Kouichi |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_03207 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Competitive coexistence of ferromagnetism and metal--insulator transition of VO$_2$ nanoparticles Hatano, Tsuyoshi Fukawa, Akihiro Yamamoto, Hiroki Akiba, Keiichirou Takase, Kouichi Materials Science 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. |
| title | Competitive coexistence of ferromagnetism and metal--insulator transition of VO$_2$ nanoparticles |
| topic | Materials Science |
| url | https://arxiv.org/abs/2404.03207 |