2007/05/21 by Volodymyr P. Kravchuk, Denis D. Sheka, Yuri Gaididei +1 · 1 citation
Engineering · Physics and Astronomy · #Annihilation #Characterization and Applications of Magnetic Nanoparticles #Condensed matter physics #Field (mathematics) #Magnetic field #Magnetic properties of thin films #Magnetization #Mechanics #Micromagnetics #Optics #Permalloy #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Plane (geometry) #Quantum mechanics #Rotating magnetic field #Ultrashort pulse #Vortex #Vortex state #cond-mat.str-el
paper · pdf · doi:10.1063/1.2770819
published as J. Appl. Phys. 101 (2007) 043908 · REVTeX, 5 pages, 5 figures
arxiv created 2007/05/21 · openalex publication_date 2007/08/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The control of the vortex state magnetic nanoparticle by ultrafast magnetic fields is studied theoretically. Using the micromagnetic simulations for the Permalloy nanodisk we demonstrate that the vortex core magnetization can be irreversible switched by the alternating field, rotating in the disk plane, with the frequency about 10 GHz and intensity about 20 mT. We propose an analytical picture of such phenomena involving the creation and annihilation of vortex-antivortex pairs and calculate the phase diagram of the fields parameters leading to the switching.