B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo
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 thermodyn...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aae282 |
| _version_ | 1797750586122174464 |
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| author | M Böttcher S Heinze S Egorov J Sinova B Dupé |
| author_facet | M Böttcher S Heinze S Egorov J Sinova B Dupé |
| author_sort | M Böttcher |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T16:35:56Z |
| format | Article |
| id | doaj.art-dbddfadbf21a406ba785eb34dfac36fa |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:35:56Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-dbddfadbf21a406ba785eb34dfac36fa2023-08-08T14:54:58ZengIOP PublishingNew Journal of Physics1367-26302018-01-01201010301410.1088/1367-2630/aae282B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte CarloM Böttcher0S Heinze1S Egorov2J Sinova3https://orcid.org/0000-0002-9490-2333B Dupé4https://orcid.org/0000-0001-7025-4426Institut für Physik, Johannes Gutenberg Universität Mainz , D-55099 Mainz, Germany; Institute of Theoretical Physics and Astrophysics, University of Kiel , D-24098 Kiel, Germany; Graduate School Materials Science in Mainz , D-55128 Mainz, GermanyInstitute of Theoretical Physics and Astrophysics, University of Kiel , D-24098 Kiel, GermanyDepartment of Chemistry, University of Virginia , Charlottesville, VA 22901, United States of America; Leibniz-Institut für Polymerforschung, Institut Theorie der Polymere , D-01069 Dresden, GermanyInstitut für Physik, Johannes Gutenberg Universität Mainz , D-55099 Mainz, Germany; Institute of Physics , Academy of Sciences of the Czech Republic, Cukrovarnická 10, 162 53 Praha 6, CzechiaInstitut für Physik, Johannes Gutenberg Universität Mainz , D-55099 Mainz, Germany; Institute of Theoretical Physics and Astrophysics, University of Kiel , D-24098 Kiel, GermanyWe 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.https://doi.org/10.1088/1367-2630/aae282magnetic skyrmionsthermodynamic studyMonte Carlo simulationsfrustration of magnetic exchange |
| spellingShingle | M Böttcher S Heinze S Egorov J Sinova B Dupé B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo New Journal of Physics magnetic skyrmions thermodynamic study Monte Carlo simulations frustration of magnetic exchange |
| title | B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo |
| title_full | B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo |
| title_fullStr | B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo |
| title_full_unstemmed | B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo |
| title_short | B–T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo |
| title_sort | b t phase diagram of pd fe ir 111 computed with parallel tempering monte carlo |
| topic | magnetic skyrmions thermodynamic study Monte Carlo simulations frustration of magnetic exchange |
| url | https://doi.org/10.1088/1367-2630/aae282 |
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