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Finite-temperature interatomic exchange and magnon softening in Fe overlayers on Ir(001)
Faculdade de Física, Universidade Federal do Pará, Belém, Pará.
Department of Physics and Astronomy, Uppsala University.
Faculdade de Física, Universidade Federal do Pará, Belém, Pará.
Department of Physics and Astronomy, Uppsala University.
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2016 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 94, no 1, article id 14413Article in journal (Refereed) Published
Abstract [en]

We evaluate how thermal effects soften the magnon dispersion in 6 layers of Fe(001) on top of Ir(001). We perform a systematic study considering noncollinear spin arrangement and calculate configuration-dependent exchange parameters J(ij)(nc) following the methodology described by Szilva et al. [Phys. Rev. Lett. 111, 127204 (2013)]. In addition, Monte Carlo simulations were performed in order to estimate the noncollinear spin arrangement as a function of temperature. Hence the J(ij)(nc)'s related to these configurations were calculated and used in an atomistic spin dynamics approach to evaluate the magnon spectra. Our results show good agreement with recent room-temperature measurements, and highlights how thermal effects produce magnon softening in this, and similar, systems

Place, publisher, year, edition, pages
2016. Vol. 94, no 1, article id 14413
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Other Physics Topics
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Tillämpad fysik
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URN: urn:nbn:se:ltu:diva-10198DOI: 10.1103/PhysRevB.94.014413ISI: 000379497400007Scopus ID: 2-s2.0-84978427861Local ID: 8f507e95-5ca1-499c-93f7-c48ef61c874cOAI: oai:DiVA.org:ltu-10198DiVA, id: diva2:983138
Note
Validerad; 2016; Nivå 2; 20160816 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Etz, Corina

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