Skyrmions with attractive interactions in an ultrathin magnetic film

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RÓZSA, Levente, András DEÁK, Eszter SIMON, Rocio YANES, László UDVARDI, László SZUNYOGH, Ulrich NOWAK, 2016. Skyrmions with attractive interactions in an ultrathin magnetic film. In: Physical Review Letters. 117(15), 157205. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.117.157205

@article{Rozsa2016-06-08T09:15:19ZSkyrm-37524, title={Skyrmions with attractive interactions in an ultrathin magnetic film}, year={2016}, doi={10.1103/PhysRevLett.117.157205}, number={15}, volume={117}, issn={0031-9007}, journal={Physical Review Letters}, author={Rózsa, Levente and Deák, András and Simon, Eszter and Yanes, Rocio and Udvardi, László and Szunyogh, László and Nowak, Ulrich}, note={Paper: 6 pages, 4 figures; Supplemental Material: 5 pages, 3 figures Article Number: 157205} }

Udvardi, László Yanes, Rocio Rózsa, Levente Szunyogh, László Skyrmions with attractive interactions in an ultrathin magnetic film Nowak, Ulrich Yanes, Rocio Udvardi, László Szunyogh, László eng Simon, Eszter 2016-06-08T09:15:19Z 2017-02-16T14:22:47Z We determined the parameters of a classical spin Hamiltonian describing an Fe monolayer on Pd(111) surface with a Pt<sub>1-x</sub>Ir<sub>x</sub> alloy overlayer from ab initio calculations. While the ground state of the system is ferromagnetic for x=0.00, it becomes a spin spiral state as Ir is intermixed into the overlayer. Although the Dzyaloshinsky-Moriya interaction is present in the system, we will demonstrate that the frustrated isotropic exchange interactions play a prominent role in creating the spin spiral state, and these frustrated couplings lead to an attractive interaction between skyrmions at short distances. Using spin dynamics simulations, we show that under these conditions the individual skyrmions form clusters, and that these clusters remain stable at finite temperature. Rózsa, Levente Deák, András Nowak, Ulrich Deák, András Simon, Eszter 2017-02-16T14:22:47Z

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