2010 Fiscal Year Final Research Report
Magnetization dynamics of nanostructured magnet in a large amplitude field
| Project/Area Number |
21760228
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Tohoku University |
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Principal Investigator |
KIKUCHI Nobuaki Tohoku University, 多元物質科学研究所, 助教 (80436170)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 動的磁化挙動 / パルス磁場 / ナノ磁性体 / 磁気記録 |
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| Research Abstract |
In this research project magnetization behavior of nanoscal magnets with perpendicular anisotropy in sub-nanoseconds time regime has been investigated. A Pulse field generator with sub nanoseconds duration, which is comparable with magnetization reversal time, was developed. Magnetization reversal experiments were carried out on single dots of Co/Pd and Co/Pt multi layers. Magnetization reversal of those dots is governed by an embryo with a dimension of exchange length, and the behavior of those embryos can be well described with a thermally activated model from sub-nanoseconds to static time regime.
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