Formation and stability of metastable skyrmionic spin structures with various topologies in an ultrathin film

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2017
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Palotás, Krisztián
Deák, András
Simon, Eszter
Udvardi, László
Szunyogh, László
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SFB 767 - TP C10 Control of magnetic nanostructures by spin currents and thermal gradients
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Physical Review B. 2017, 95(9), 094423. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.95.094423
Zusammenfassung

We observe metastable localized spin configurations with topological charges ranging from Q=-3 to Q=2 in a (Pt0.95Ir0.05)/Fe bilayer on Pd(111) surface by performing spin dynamics simulations, using a classical Hamiltonian parametrized by ab initio calculations. We demonstrate that the frustration of the isotropic exchange interactions is responsible for the creation of these various types of skyrmionic structures. The Dzyaloshinsky--Moriya interaction present due to the breaking of inversion symmetry at the surface energetically favors skyrmions with Q=-1, distorts the shape of the other objects, and defines a preferred orientation for them with respect to the underlying lattice.

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ISO 690RÓZSA, Levente, Krisztián PALOTÁS, András DEÁK, Eszter SIMON, Rocio YANES DÍAZ, László UDVARDI, László SZUNYOGH, Ulrich NOWAK, 2017. Formation and stability of metastable skyrmionic spin structures with various topologies in an ultrathin film. In: Physical Review B. 2017, 95(9), 094423. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.95.094423
BibTex
@article{Rozsa2017Forma-39002,
  year={2017},
  doi={10.1103/PhysRevB.95.094423},
  title={Formation and stability of metastable skyrmionic spin structures with various topologies in an ultrathin film},
  number={9},
  volume={95},
  issn={2469-9950},
  journal={Physical Review B},
  author={Rózsa, Levente and Palotás, Krisztián and Deák, András and Simon, Eszter and Yanes Díaz, Rocio and Udvardi, László and Szunyogh, László and Nowak, Ulrich},
  note={Article Number: 094423}
}
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