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

Pfau, Bastian LU ; Guenther, C. M.; Guehrs, E.; Hauet, T.; Hennen, T.; Eisebitt, S. and Hellwig, O. (2014) In Applied Physics Letters 105(13).
Abstract
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 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... (More)
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 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. (C) 2014 Author(s). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Physics Letters
volume
105
issue
13
publisher
American Institute of Physics
external identifiers
  • wos:000343031700041
  • scopus:84907806058
ISSN
0003-6951
DOI
10.1063/1.4896982
language
English
LU publication?
yes
id
b5950445-c0ec-4530-8115-5b010a7b4250 (old id 4790365)
date added to LUP
2014-11-21 12:38:49
date last changed
2017-08-27 03:29:37
@article{b5950445-c0ec-4530-8115-5b010a7b4250,
  abstract     = {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 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. (C) 2014 Author(s).},
  articleno    = {132407},
  author       = {Pfau, Bastian and Guenther, C. M. and Guehrs, E. and Hauet, T. and Hennen, T. and Eisebitt, S. and Hellwig, O.},
  issn         = {0003-6951},
  language     = {eng},
  number       = {13},
  publisher    = {American Institute of Physics},
  series       = {Applied Physics Letters},
  title        = {Influence of stray fields on the switching-field distribution for bit-patterned media based on pre-patterned substrates},
  url          = {http://dx.doi.org/10.1063/1.4896982},
  volume       = {105},
  year         = {2014},
}