Title :
Magnonics Crystal Composed by Magnetic Antivortices Confined in Antidots
Author :
Ragusa, Carlo ; Carpentieri, Michele ; Celegato, Federica ; Tiberto, Paola ; Enrico, E. ; Boarino, Luca ; Finocchio, Giovanni
Author_Institution :
Dept. of Ing. Elettr., Politec. of Torino, Torino, Italy
Abstract :
A magnetic patterned system constituted by antidots has been synthesized by electron beam lithography and its static and dynamical properties have been studied. Magnetic-domain patterns related to the static hysteresis loop have been acquired by means of magnetic force microscopy. The dynamical response to a magnetic field pulse has been studied by means of micromagnetic simulations. We found the magnetic response of a single antidot (excitation of a single mode) is qualitatively different from the one of coupled antidots (excitation of two modes). In the latter configuration, micromagnetic simulations show the low-frequency mode related to the in-phase oscillation of the magnetization and the high-frequency mode related to the out-of-phase oscillation of the magnetization.
Keywords :
electron beam lithography; iron alloys; magnetic domains; magnetic force microscopy; magnetic hysteresis; magnetisation; magnons; metallic thin films; nickel alloys; oscillations; quantum dots; vortices; Ni80Fe20; antidots; electron beam lithography; high-frequency mode; in-phase oscillation; low-frequency mode; magnetic antivortex; magnetic field pulse; magnetic force microscopy; magnetic patterned system; magnetic response; magnetic-domain patterns; magnetization; magnonics crystal; micromagnetic simulations; out-of-phase oscillation; static hysteresis loop; Crystals; Magnetic cores; Magnetic hysteresis; Magnetic resonance imaging; Magnetization; Magnetoacoustic effects; Micromagnetics; Magnetic films; magnetic force microscopy; magnonics crystal; micromagnetics;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2158578
