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Magnon softening in a ferromagnetic monolayer: A first-principles spin dynamics study
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
Uppsala University, Sweden.ORCID iD: 0000-0003-4341-5663
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2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 14, 144416- p.Article in journal (Refereed) Published
Abstract [en]

We study the Fe/W(110) monolayer system through a combination of first-principles calculations and atomistic spin dynamics simulations. We focus on the dispersion of the spin-waves parallel to the [001] direction. Our results compare favorably with the experimental data of Prokop et al. [Phys. Rev. Lett. 102, 177206 (2009)] and correctly capture a drastic softening of the magnon spectrum, with respect to bulk bcc Fe. The suggested shortcoming of the itinerant electron model, in particular that given by density functional theory, is refuted. We also demonstrate that finite-temperature effects are significant, and that atomistic spin dynamics simulations represent a powerful tool with which to include these.

Place, publisher, year, edition, pages
2010. Vol. 81, no 14, 144416- p.
National Category
Condensed Matter Physics
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URN: urn:nbn:se:kth:diva-27931DOI: 10.1103/PhysRevB.81.144416ISI: 000277210200080Scopus ID: 2-s2.0-77955196610OAI: oai:DiVA.org:kth-27931DiVA: diva2:384607
Note

QC 20110110

Available from: 2011-01-10 Created: 2011-01-03 Last updated: 2017-12-11Bibliographically approved

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Bergqvist, Lars

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