2020 Fiscal Year Annual Research Report
Development of wide-frequency band and high-frequency tunneling magneto-dielectric effect in gradient granular structure
| Project/Area Number |
19K15285
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| Research Institution | Tohoku University |
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Principal Investigator |
曹 洋 東北大学, 学際科学フロンティア研究所, 助教 (50804598)
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| Project Period (FY) |
2019-04-01 – 2021-03-31
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| Keywords | Composition-gradient / Si dopant / magneto-dielectric / large enhancement / dielectric properties |
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| Outline of Annual Research Achievements |
Tunneling magneto-dielectric (TMD) effect in nanocomposites discovered by our group in 2014 features a narrow peak of the maximum dielectric variations. This limits its magnetoelectric application over a wide frequency range. From the practical viewpoint, it is highly demanded to develop the broadband TMD response. In this research, I have proposed and fabricated a composition-gradient multilayer nanogranular structure that can exhibit a broadband TMD effect up to megahertz frequency range. Additionally, I have realized the unprecedented high TMD response up to 8.5% with small addition of Si into the conventional nanogranular films.
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Research Products
(8 results)
