Current-Induced Microwave Excitation of a Domain Wall Pinned in a Magnetic Wire with Bi-Axial Anisotropy

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概要

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• We studied the current-induced magnetization dynamics of a domain wall pinned geometrically in a magnetic wire with bi-axial anisotropy. We showed that above the threshold current density, breathing-mode excitation, where the thickness of the domain wall oscillates, is induced by spin-transfer torque. We found that the breathing-mode can be applied as a source of microwave oscillation because the resistance of the domain wall is a function of the domain wall thickness. In a current sweep simulation, the frequency of the breathing-mode exhibits hysteresis due to the pinning.

• 2009-09-15

著者

• Imamura Hiroshi

  Nanotechnology Research Institute (nri) National Institute Of Advanced Industrial Science And Techno

• Sato Jun

  Nanotechnology Research Institute (NRI), AIST, Tsukuba, Ibaraki 305-8568

• Sato Jun

  Nanotechnology Research Institute (NRI), Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 2, Tsukuba, Ibaraki 305-8568, Japan

• Matsushita Katsuyoshi

  Nanotechnology Research Institute (NRI), AIST, Tsukuba, Ibaraki 305-8568

• Matsushita Katsuyoshi

  Nanotechnology Research Institute (NRI), Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 2, Tsukuba, Ibaraki 305-8568, Japan

関連論文

• Determination of Penetration Depth of Transverse Spin Current in Ferromagnetic Metals by Spin Pumping
• Spectral Properties of Interacting One-Dimensional Spinless Fermions
• Current-Induced Exchange Length and Geometrically Constrained Magnetic Wall
• Current-Induced Microwave Excitation of a Domain Wall Pinned in a Magnetic Wire with Bi-Axial Anisotropy

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