Current-Induced Exchange Length and Geometrically Constrained Magnetic Wall
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概要
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We analyzed stable magnetic structures of a geometrically constrained magnetic wall under direct current (dc) and found that there exists a characteristic length induced by the competition between the spin transfer torque and the torque due to exchange interaction. This current-induced exchange length is inversely proportional to the applied dc, and the magnetic ripple structure appears when the current-induced exchange length is smaller than the nanoscale constriction. We also found that the amplitude of the magnetic ripple structure oscillates as a function of the applied dc, which can be observed as an oscillation of the resistance against the applied dc.
- 2010-03-15
著者
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Imamura Hiroshi
Nanotechnology Research Institute (nri) National Institute Of Advanced Industrial Science And Techno
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Imamura Hiroshi
Nanotechnology Research Institute (NRI), Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 2, Tsukuba, Ibaraki 305-8568, Japan
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Sato Jun
Nanotechnology Research Institute (NRI), Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 2, Tsukuba, Ibaraki 305-8568, Japan
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Matsushita Katsuyoshi
Nanotechnology Research Institute (NRI), Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 2, Tsukuba, Ibaraki 305-8568, Japan
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