| Project/Area Number |
26870304
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kyoto University |
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Principal Investigator |
Kim Kab-Jin 京都大学, 化学研究所, 助教 (40711776)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | ジャロシンスキー・守谷相互作用 / 磁壁 / 磁気ソリトン / 磁壁クリープ / 次元変換 / フェリ磁性体磁壁 / Dzyaloshinskii Moriya / Magnetic domain wall / Magnetic soliton / domain wall creep / dimensional transition / ferrimagnetic GdFeCo / quantification of DMI / DMI and domain wall |
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| Outline of Final Research Achievements |
The goal of this study was to elucidate the effect of the Dzyaloshinskii-Moriya interaction (DMI) on the magnetic domain wall (DW) dynamics. In FY 2014, I developed DW measurement system to investigate the real time DW dynamics. Using this setup, I proposed several ways to quantify the DMI magnetic heterostructures. I have also shown an evidence of magnetic DW oscillator in FY 2014. In FY 2015, I tried to elucidate the underlying physics of DW dynamics in the presence of DMI. As a result, I have found that the DW motion becomes topologically protected in the presence of DMI. I also have found that the DW motion shows dimensional transition from 2 dimension to 1 dimension. Based on the soliton approach, I also found that the 2 dimensional DW motion can be simplified to 1 dimensional motion in the presence of DMI. I have also found the evidence of DMI in ferrimagnetic systems. Overall, all the goals, which were originally proposed in this project, have been suuccessfully addressed.
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