Domain wall depinning from notches using combined in- and out-of-plane magnetic fields | Zendy

Jelle J. W. Goertz | Zendy; Gražvydas Žiemys | Zendy; Irina Eichwald | Zendy; Markus Becherer | Zendy; H. J. M. Swagten | Zendy; Stephan Breitkreutz-v. Gamm | Zendy

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Domain wall depinning from notches using combined in- and out-of-plane magnetic fields

Author(s) -

Jelle J. W. Goertz,

Gražvydas Žiemys,

Irina Eichwald,

Markus Becherer,

H. J. M. Swagten,

Stephan Breitkreutz-v. Gamm

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4944698

Subject(s) - condensed matter physics , domain wall (magnetism) , nanowire , magnetic domain , magnetic field , magnetization , perpendicular , materials science , magnetic anisotropy , micromagnetics , pinning force , anisotropy , plane (geometry) , superconductivity , physics , nanotechnology , critical current , optics , geometry , mathematics , quantum mechanics

Controlled domain wall motion and pinning in nanowires with perpendicular magnetic anisotropy are of great importance in modern magnetic memory and logic devices. Here, we investigate by experiment the DW pinning and depinning from a notch in a magnetic nanowire, under the influence of combined in- and out-of-plane magnetic fields. In our experiment, the perpendicular magnetization of the Co/Pt nanowires is tilted with the help of sub-μs in-plane field pulses generated by an on-chip coil. Consequently, the energy density of the DW is decreased and the depinning field of the notch is reduced. A theoretical model is applied and compared to the measurement results. The DW depinning mechanism and the DW type are further investigated by micromagnetic simulations

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