Current Induced Dynamical Phases on Geometrically Constrained Magnetic Wall

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  • Matsushita Katsuyoshi
    Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST)
  • Sato Jun
    Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST)
  • Imamura Hiroshi
    Nanotechnology Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST)
  • Sasaki Munetaka
    Department of Applied Physics, Tohoku University

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Other Title
  • 幾何学的閉じ込め磁壁の電流誘起動的相
  • キカガクテキ トジコメ ジヘキ ノ デンリュウ ユウキ ドウテキソウ

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Abstract

  We numerically investigated current-induced dynamical phases of a geometrically constrained magnetic wall (GCMW) confined in a magnetic nano-scale contact. We clarified that the dynamical phase depend on the value of current j and there exist three dynamical phases which are separated by two threshold currents of jc1 and jc2. For j < jc1, we confirmed that the GCMW is deconfined from the contact because of the current induced displacement of the GCMW. On the other hand, we found that the GCMW is confined in the contact for jc1 < j < jc2. For j > jc2, we also found an oscillation where nucleation and annihilation of a magnetic domain are alternately repeated.

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