Title :
Modeling of the influence of defects on magnonic spectra of permalloy antidot arrays
Author :
Manzin, A. ; Barrera, G. ; Celegato, F. ; Coisson, M. ; Tiberto, P.
Author_Institution :
Ist. Naz. di Ricerca Metrol., Turin, Italy
Abstract :
In this work, we numerically investigate the influence of randomly distributed lattice defects (non-patterned areas and variable hole size) on the ferromagnetic resonance behavior and spin wave mode profiles of 2D permalloy antidot arrays with hexagonal lattice. In order to have a realistic distribution of disorder, we simulate large-scale samples (with ~10 μm size) by means of a GPU-based micromagnetic solver, which combines a fast multipole method for the magnetostatic field calculation to a finite difference technique for the exchange field evaluation on non-structured meshes.
Keywords :
Permalloy; ferromagnetic materials; ferromagnetic resonance; finite difference methods; magnons; micromagnetics; quantum dots; spin waves; 2D permalloy antidot arrays; GPU-based micromagnetic solver; Ni80Fe20; exchange field evaluation; ferromagnetic resonance behavior; finite difference technique; hexagonal lattice; hole size; magnetostatic field calculation; magnonic spectra; nonpatterned areas; nonstructured meshes; randomly distributed lattice defects; spin wave mode profiles; Lattices; Magnetic films; Magnetic hysteresis; Magnetic resonance; Magnetometers; Magnetostatic waves; Magnetostatics;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157674
