Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates [article]

Bastian Pfau, Christian M. Günther, Erik Guehrs, Thomas Hauet, T. Hennen, Stefan Eisebitt, Olav Hellwig, Technische Universität Berlin
Using a direct imaging method, we experimentally investigate the reversal of magnetic islands in a bit-patterned media sample based on a pre-patterned substrate. Due to systematic variation of the island distances in the media, we are able to study the influence of the dipolar interaction on the switching-field distribution of the island ensemble. The experimental findings are explained by an analytical magnetostatic model that allows us to quantify the different components of the demagnetizing
more » ... field in the system and to distinguish intrinsic and dipolar broadening of the switching-field distribution. Besides the well-known dipolar broadening due to stray fields from neighboring islands, we find strong influence from the magnetized trench material on the island switching.
doi:10.14279/depositonce-14991 fatcat:i2hvjbqc4bcbbghlktupzcduci