Theory of current-driven domain wall dynamics

G. Tatara, H. Kohno, J. Shibata, Eiji Saitoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Motion of a planar domain wall in a nanoscale ferromagnetic wire under electric current is studied based on microscopic description. In the adiabatic case, domain wall is driven by spin torque (spin transfer), and there is an intrinsic pinning arising from hard-axis anisotropy energy. Extrinsic pinning does not affect the threshold current in this case. A resonating oscillation of domain wall occurs under AC current, and this was recently used for a spectroscopy of a single "domain wall particle". Nucleation of domain walls by spin torque is discussed. Fundamental mechanism of spin transfer effect is understood in terms of spin Josephson effect.

Original languageEnglish
Title of host publicationProceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
PublisherWorld Scientific Publishing Co. Pte Ltd
Pages177-182
Number of pages6
ISBN (Print)9812568581, 9789812568588
Publication statusPublished - 2006 Jan 1
Event8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005 - Hatoyama, Saitama, Japan
Duration: 2005 Aug 222005 Aug 25

Publication series

NameProceedings of the 8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005

Other

Other8th International Symposium on Foundations of Quantum Mechanics in the Light of New Technology, ISQM-Tokyo 2005
CountryJapan
CityHatoyama, Saitama
Period05/8/2205/8/25

Keywords

  • Domain wall
  • Spin torque
  • Spintronics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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