Hysteresis-free switching between vortex and collinear magnetic states

Erik Östman, Unnar B. Arnalds, Emil Melander, Vassilios Kapaklis, Gunnar K. Pálsson, Alexander Y. Saw, Marc A. Verschuuren, Florian Kronast, Evangelos Th Papaioannou, Charles S. Fadley, Björgvin HjÖrvarsson

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We demonstrate a lossless switching between vortex and collinear magnetic states in circular FePd disks arranged in a square lattice. Above a bifurcation temperature (Te) we show that thermal fluctuations are enough to facilitate flipping between the two distinctly different magnetic states. We find that the temperature dependence of the vortex annihilation and nucleation fields can be described by a simple power law relating them to the saturation magnetization.

Original languageEnglish
Article number053002
JournalNew Journal of Physics
Publication statusPublished - May 2014

Other keywords

  • magnetic nanostructures
  • magnetic vortices
  • thermal fluctuations


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