2003/11/03 by S. E. Barnes, Sadamichi Maekawa, Barnes, S. E. +2
Physics and Astronomy · #Angular momentum #Anisotropy #Classical mechanics #Condensed matter physics #Current (fluid) #Distortion (music) #Domain wall (magnetism) #Electron #FOS: Physical sciences #Ferromagnetism #Field (mathematics) #Geometry #Magnetic field #Magnetic properties of thin films #Magnetization #Magnon #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Momentum transfer #Perpendicular #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Scattering #Strongly Correlated Electrons (cond-mat.str-el) #Thermal conduction #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0311039
4 pages 1 figure
openalex publication_date 2003/11/03 · arxiv created 2004/04/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The coupling between a current and a Bloch wall is examined in the half-metal limit of the double exchange model. The conduction electrons transfer angular momentum to the Bloch wall with 100% efficiency in the absence of pinning. The wall is displaced without distortion with velocity proportional to the current. In the presence of a pinning potential either the angular momentum is destroyed by the perpendicular component of the anisotropy field or is converted to coherent magnons. A moving wall has its velocity reduced by pinning. The expression for the velocity agrees surprisingly well with experiment.