2017 Fiscal Year Final Research Report
Study of current-induced dynamics of magnetic bubble domains in ferromagnetic wires
Project/Area Number |
15K17706
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics II
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Research Institution | Nagoya Institute of Technology |
Principal Investigator |
Tanaka Masaaki 名古屋工業大学, 工学(系)研究科(研究院), 助教 (50508405)
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Keywords | スピントロニクス / スピントランスファートルク / スピンホール効果 |
Outline of Final Research Achievements |
The current-induced dynamics of bubble domains in perpendicularly magnetized ferrimagnetic (transition-metal-rare-earth alloy) wires with Pt cap layers was investigated. It was found that the shape change of the bubble domains occurred by the current flow and that it is difficult to move the bubble domains by the current flow. We found that the bubble domains moved to the electric current direction with growing in oblique angles when the spin currents via spin Hall effect were induced. The oblique directions of the bubble-domain’s growth in the wire with the transition-metal-dominant and rare-earth-dominant magnetizations were opposite with each other. Comparison between experimental results and micromagnetic calculations, in which the spin injection from the Pt layer was considered, implied that the spin currents via spin Hall effect provide spin transfer torque to the magnetic moment of transition metal layers more than that of rare-earth metal layers.
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Free Research Field |
磁性物理学
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