Magnetization reversal in antidots

Geometry-dependent magnetization reversal mechanism in ordered Py antidot arrays.
K J Merazzo, D C Leitao, E Jiménez, J P Araujo, J Camarero, R P del Real, A Asenjo and M Vázquez
JPD 44, 505001 (2011)

FORC diagrams of films with thickness tPy = 18 nm: (a) continuous film, and arrays of antidots with diameter (b) dp = 35 nm,
(c) dp = 48 nm and (d) dp = 54 nm.