2007/02/02 by Y. Liu, Yaowen Liu, S. Gliga +5 · 3 citations
Physics and Astronomy · #Condensed matter physics #Core (optical fiber) #Current (fluid) #Magnetic field #Magnetic properties of thin films #Magnetization #Magnetization dynamics #Materials science #Mechanics #Micromagnetics #Nanomagnet #Nanosecond #Optics #Permalloy #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Vortex #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.2780107
3 pages, 3 figures
arxiv created 2007/02/02 · openalex publication_date 2007/09/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The authors report on the switching of a magnetic vortex core in a submicron Permalloy disk, induced by a short current pulse applied in the film plane. Micromagnetic simulations including the adiabatic and nonadiabatic spin-torque terms are used to investigate the current-driven magnetization dynamics. They predict that a core reversal can be triggered by current bursts a tenth of a nanosecond long. The vortex core reversal process is found to be the same as when an external field pulse is applied. The control of a vortex core’s orientation using current pulses introduces the technologically relevant possibility to address individual nanomagnets within dense arrays.