Geometric control of the magnetization reversal in antidot lattices with perpendicular magnetic anisotropy

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2016
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Gräfe, Joachim
Weigand, Markus
Träger, Nick
Schütz, Gisela
Goering, Eberhard J.
Haering, Felix
Ziemann, Paul
Wiedwald, Ulf
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While the magnetic properties of nanoscaled antidot lattices in in-plane magnetized materials have widely been investigated, much less is known about the microscopic effect of hexagonal antidot lattice patterning on materials with perpendicular magnetic anisotropy. By using a combination of first-order reversal curve measurements, magnetic x-ray microscopy, and micromagnetic simulations we elucidate the microscopic origins of the switching field distributions that arise from the introduction of antidot lattices into out-of-plane magnetized GdFe thin films. Depending on the geometric parameters of the antidot lattice we find two regimes with different magnetization reversal processes. For small antidots, the reversal process is dominated by the exchange interaction and domain wall pinning at the antidots drives up the coercivity of the system. On the other hand, for large antidots the dipolar interaction is dominating which leads to fragmentation of the system into very small domains that can be envisaged as a basis for a bit patterned media.

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530 Physik
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geometric control, magnetization, antidot lattices, perpendicular, magnetic anisotropy
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ISO 690GRÄFE, Joachim, Markus WEIGAND, Nick TRÄGER, Gisela SCHÜTZ, Eberhard J. GOERING, Maxim SKRIPNIK, Ulrich NOWAK, Felix HAERING, Paul ZIEMANN, Ulf WIEDWALD, 2016. Geometric control of the magnetization reversal in antidot lattices with perpendicular magnetic anisotropy. In: Physical Review B. 2016, 93(10), 104421. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.93.104421
BibTex
@article{Grafe2016-03-28Geome-33881,
  year={2016},
  doi={10.1103/PhysRevB.93.104421},
  title={Geometric control of the magnetization reversal in antidot lattices with perpendicular magnetic anisotropy},
  number={10},
  volume={93},
  issn={2469-9950},
  journal={Physical Review B},
  author={Gräfe, Joachim and Weigand, Markus and Träger, Nick and Schütz, Gisela and Goering, Eberhard J. and Skripnik, Maxim and Nowak, Ulrich and Haering, Felix and Ziemann, Paul and Wiedwald, Ulf},
  note={Article Number: 104421}
}
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