Complex magnetic phase diagram and skyrmion lifetime in an ultrathin film from atomistic simulations

Levente Rózsa, Eszter Simon, K. Palotás, L. Udvardi, L. Szunyogh

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27 Citations (Scopus)

Abstract

We determined the magnetic B-T phase diagram of PdFe bilayer on Ir(111) surface by performing Monte Carlo and spin dynamics simulations based on an effective classical spin model. The parameters of the spin model were determined by ab initio methods. At low temperatures we found three types of ordered phases, while at higher temperatures, below the completely disordered paramagnetic phase, a large region of the phase diagram is associated with a fluctuation-disordered phase. Within the applied model, this state is characterized by the presence of skyrmions with finite lifetime. According to the simulations, this lifetime follows the Arrhenius law as a function of temperature.

Original languageEnglish
Article number024417
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume93
Issue number2
DOIs
Publication statusPublished - Jan 21 2016

Fingerprint

Ultrathin films
Phase diagrams
phase diagrams
life (durability)
Spin dynamics
simulation
spin dynamics
Temperature
Computer simulation
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

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AU - Rózsa, Levente

AU - Simon, Eszter

AU - Palotás, K.

AU - Udvardi, L.

AU - Szunyogh, L.

PY - 2016/1/21

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AB - We determined the magnetic B-T phase diagram of PdFe bilayer on Ir(111) surface by performing Monte Carlo and spin dynamics simulations based on an effective classical spin model. The parameters of the spin model were determined by ab initio methods. At low temperatures we found three types of ordered phases, while at higher temperatures, below the completely disordered paramagnetic phase, a large region of the phase diagram is associated with a fluctuation-disordered phase. Within the applied model, this state is characterized by the presence of skyrmions with finite lifetime. According to the simulations, this lifetime follows the Arrhenius law as a function of temperature.

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