Controlling magnetization reversal in Co/Pt nanostructures with perpendicular anisotropy

M. Tofizur Rahman; Randy K. Dumas; Nasim Eibagi; Nazmun N Shams; Yun-Chung Wu; Kai Liu; Chih-Huang Lai

doi:10.1063/1.3075061

Controlling magnetization reversal in Co/Pt nanostructures with perpendicular anisotropy

Materials Science 2009-01-30 v1

Authors: M. Tofizur Rahman , Randy K. Dumas , Nasim Eibagi , Nazmun N Shams , Yun-Chung Wu , Kai Liu , Chih-Huang Lai

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Abstract

We demonstrate a simple method to tailor the magnetization reversal mechanisms of Co/Pt multilayers by depositing them onto large area nanoporous anodized alumina (AAO) with various aspect ratios, A = pore depth/diameter. Magnetization reversal of composite (Co/Pt)/AAO films with large A is governed by strong domain-wall pinning which gradually transforms into a rotation-dominated reversal for samples with smaller A, as investigated by a first-order reversal curve method in conjunction with analysis of the angular dependent switching fields. The change of the magnetization reversal mode is attributed to topographical changes induced by the aspect ratio of the AAO templates.

Keywords

magnetic anisotropy thin film magnetism magnetic nanoparticles

Cite

@article{arxiv.0901.4562,
  title  = {Controlling magnetization reversal in Co/Pt nanostructures with perpendicular anisotropy},
  author = {M. Tofizur Rahman and Randy K. Dumas and Nasim Eibagi and Nazmun N Shams and Yun-Chung Wu and Kai Liu and Chih-Huang Lai},
  journal= {arXiv preprint arXiv:0901.4562},
  year   = {2009}
}

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12 pages, 3 figures

Controlling magnetization reversal in Co/Pt nanostructures with perpendicular anisotropy

Abstract

Keywords

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