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Domain wall generated by graded interlayer coupling in Co/Pt/Co film with perpendicular anisotropy

Applied Physics Letters, ISSN: 0003-6951, Vol: 107, Issue: 1
2015
  • 9
    Citations
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  • 24
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Metrics Details

  • Citations
    9
    • Citation Indexes
      9
  • Captures
    24

Article Description

A magnetic multilayer of the structure substrate/Pt-15 nm/Co-0.8 nm/Pt-wedge(0-7 nm)/Co-0.6 nm/Pt-2 nm is characterized by perpendicular anisotropy of both Co layers. For a Pt spacer thickness t Pt ≤ 2.6 nm, the magnetization reversal of the Co-layers occurs cooperatively, while for larger t Pt, it occurs sequentially. The Co-layer with 0.6 nm thickness (Co) is magnetically softer than the second one (Co). In the 2.6 ≤ t Pt ≤ 3.0 nm range, there are significant changes of the switching field due to a strong gradient of the interlayer coupling. In this region, the magnetization reversal in the Co layer takes place reversibly by the propagation of a single, straight domain wall. This specific nature of magnetization reversal is explained by a decelerated motion of the domain wall observed both for the direction corresponding to the increasing, as well as decreasing coupling energy.

Bibliographic Details

M. Matczak; R. Schäfer; M. Urbaniak; B. Szymański; P. Kuświk; A. Jarosz; M. Schmidt; J. Aleksiejew; S. Jurga; F. Stobiecki

AIP Publishing

Physics and Astronomy

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