4.6 Article

Exchange coupled composite bit patterned media

Journal

APPLIED PHYSICS LETTERS
Volume 97, Issue 8, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.3481668

Keywords

magnetic anisotropy; magnetic storage; magnetic switching; magnetisation reversal; micromagnetics; thermal stability

Funding

  1. European Commission [224001]

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A micromagnetic study on the magnetization reversal in bit patterned media (BPM) with each bit consisting of an exchange coupled composite (ECC) layer stack is presented. The simulations reveal superior magnetic properties of the combined ECC/BPM scheme, in particular for graded media, using uncorrelated distributions of magnetic anisotropy values in order to lower the switching field while keeping a high thermal stability of the media. In this study, a route for narrowing the switching field distribution of the bit array is provided as well, which is vital for the applicability of the BPM concept in magnetic data storage.

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