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

2016

Article

mms


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.

Author(s): Gräfe, J. and Weigand, M. and Träger, Nick-André and Schütz, G. and Goering, E. J. and Skripnik, M. and Nowak, U. and Haering, F. and Ziemann, P. and Wiedwald, U.
Journal: {Physical Review B}
Volume: 93
Number (issue): 10
Year: 2016
Publisher: American Physical Society

Department(s): Modern Magnetic Systems
Research Project(s): First-Order Reversal Curves
Magnetism in Antidot Lattices
Bibtex Type: Article (article)

Address: Woodbury, NY
DOI: 10.1103/PhysRevB.93.104421
Language: eng

BibTex

@article{escidoc:0082,
  title = {{Geometric control of the magnetization reversal in antidot lattices with perpendicular magnetic anisotropy}},
  author = {Gr\"afe, J. and Weigand, M. and Tr\"ager, Nick-Andr\'e and Sch\"utz, G. and Goering, E. J. and Skripnik, M. and Nowak, U. and Haering, F. and Ziemann, P. and Wiedwald, U.},
  journal = {{Physical Review B}},
  volume = {93},
  number = {10},
  publisher = {American Physical Society},
  address = {Woodbury, NY},
  year = {2016}
}