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

Bastian Pfau | Zendy; C. Günther | Zendy; Erik Guehrs | Zendy; Thomas Hauet | Zendy; Tyler Hennen | Zendy; Stefan Eisebitt | Zendy; Olav Hellwig | Zendy

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

Author(s) -

Bastian Pfau,

C. Günther,

Erik Guehrs,

Thomas Hauet,

Tyler Hennen,

Stefan Eisebitt,

Olav Hellwig

Publication year - 2014

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4896982

Subject(s) - patterned media , demagnetizing field , field (mathematics) , dipole , trench , condensed matter physics , materials science , magnetic field , physics , nanotechnology , magnetization , grain size , mathematics , layer (electronics) , quantum mechanics , pure mathematics , metallurgy

Équipe 101 : Nanomagnétisme et électronique de spinInternational audienceUsing 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

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