2011 Fiscal Year Final Research Report
Influence of thermal gradients and spin currents on current driven domain wall motion
| Project/Area Number |
22760015
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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 |
Applied materials science/Crystal engineering
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
HAYASHI Masamitsu 独立行政法人物質・材料研究機構, 磁性材料ユニットスピントロニクスグループ, 主任研究員 (70517854)
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| Project Period (FY) |
2010 – 2011
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| Keywords | スピントロニクス |
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| Research Abstract |
We have studied the effect of temperature gradient and/or spin wave application to reduce the threshold current density needed to move a magnetic domain wall, or to increase the wall velocity. Using joule heating to locally heat a conductor, we developed a system that has temperature gradient of 0.2K/5 um. Spin wave excitations and its detection was carried out using high frequency electrical measurements. Incidentally, we find that the domain wall nucleation field was reduced when a localized microwave field, near to the ferromagnetic resonance frequency, was applied. However, the field driven domain wall velocity showed little dependence on the application of the propagating spin waves.
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