A numerical analysis is focused on the influence of patterning and finite-size effects on the hysteresis properties and magnetization reversal of permalloy antidot films with square lattice and square holes. Simulations are performed by solving the Landau-Lifshitz equation. The aim is to explain the relationships between the shape of the hysteresis loop and the different stages of the reversal process. In particular, the switching mechanism is characterized by the nucleation of domain chains that destroy the periodic symmetry in the magnetization present when infinite periodicity is considered. This behavior is strongly influenced by the demagnetizing effects arising both at the film boundaries and at the hole edges.
A micromagnetic study of the reversal mechanism in permalloy antidot arrays / Van de Wiele, B; Manzin, Alessandra; Vansteenkiste, A; Bottauscio, Oriano; Duprè, L; De Zutter, D.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 111:(2012), p. 053915.053915. [10.1063/1.3689846]
A micromagnetic study of the reversal mechanism in permalloy antidot arrays
MANZIN, ALESSANDRA;BOTTAUSCIO, ORIANO;
2012
Abstract
A numerical analysis is focused on the influence of patterning and finite-size effects on the hysteresis properties and magnetization reversal of permalloy antidot films with square lattice and square holes. Simulations are performed by solving the Landau-Lifshitz equation. The aim is to explain the relationships between the shape of the hysteresis loop and the different stages of the reversal process. In particular, the switching mechanism is characterized by the nucleation of domain chains that destroy the periodic symmetry in the magnetization present when infinite periodicity is considered. This behavior is strongly influenced by the demagnetizing effects arising both at the film boundaries and at the hole edges.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
