Authors:	Böttcher, Marie Heinze, Stefan Egorov, Sergei Sinova, Jairo Dupé, Bertrand
Title:	B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo
Online publication date:	13-Jun-2019
Year of first publication:	2018
Language:	english
Abstract:	We use an atomistic spin model derived from density functional theory calculations for the ultra-thin film Pd/Fe/Ir(111) to show that temperature induces coexisting non-zero skyrmion and antiskyrmion densities. We apply the parallel tempering Monte Carlo method in order to reliably compute thermodynamical quantities and the B–T phase diagram in the presence of frustrated exchange interactions. We evaluate the critical temperatures using the topological susceptibility. We show that the critical temperatures depend on the magnetic field in contrast to previous work. In total, we identify five phases: spin spiral, skyrmion lattice, ferromagnetic phase, intermediate region with finite topological charge and paramagnetic phase. To explore the effect of frustrated exchange interactions, we calculate the B–T phase diagram, when only effective exchange parameters are taken into account.
DDC:	530 Physik 530 Physics
Institution:	Johannes Gutenberg-Universität Mainz
Department:	FB 08 Physik, Mathematik u. Informatik
Place:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-150
URN:	urn:nbn:de:hebis:77-publ-591001
Version:	Published version
Publication type:	Zeitschriftenaufsatz
License:	CC BY
Information on rights of use:	https://creativecommons.org/licenses/by/3.0/
Journal:	New journal of physics 20
Pages or article number:	Art. 103014
Publisher:	IOP
Publisher place:	London
Issue date:	2018
ISSN:	1367-2630
Publisher URL:	http://dx.doi.org/10.1088/1367-2630/aae282
Publisher DOI:	10.1088/1367-2630/aae282
Appears in collections:	JGU-Publikationen