Influence of nonlocal damping on magnon properties of ferromagnetsShow others and affiliations
2023 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 108, no 1, article id 014433Article in journal (Refereed) Published
Abstract [en]
We study the influence of nonlocal damping on the magnon properties of Fe, Co, Ni, and Fe1-xCox (x=30%,50%) alloys. The Gilbert damping parameter is typically considered as a local scalar both in experiment and in theoretical modeling. However, recent works have revealed that Gilbert damping is a nonlocal quantity that allows for energy dissipation between atomic sites. With the Gilbert damping parameters calculated from a state-of-the-art real-space electronic structure method, magnon lifetimes are evaluated from spin dynamics and linear response, where a good agreement is found between these two methods. It is found that nonlocal damping affects the magnon lifetimes in different ways depending on the system. Specifically, we find that in Fe, Co, and Ni, the nonlocal damping decreases the magnon lifetimes, while in Fe70Co30 and Fe50Co50 an opposite, nonlocal damping effect is observed, and our data show that it is much stronger in the former.
Place, publisher, year, edition, pages
American Physical Society, 2023. Vol. 108, no 1, article id 014433
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:oru:diva-110204DOI: 10.1103/PhysRevB.108.014433ISI: 001122919500002Scopus ID: 2-s2.0-85166950613OAI: oai:DiVA.org:oru-110204DiVA, id: diva2:1819127
Funder
Swedish Research Council, 2016-05980; 2019-05304; 2019-03666; 2016-07213Knut and Alice Wallenberg Foundation, 2018.0060Swedish Foundation for Strategic ResearchSwedish Energy AgencyeSSENCE - An eScience CollaborationStandUp
Note
Financial support from Vetenskapsradet (Grants No. VR 2016-05980, No. VR 2019-05304, and No. VR 2019-03666) , the Knut and Alice Wallenberg foundation (Grant No. 2018.0060) , the Foundation for Strategic Research (SSF) , the Swedish Energy Agency (Energimyndigheten) , the European Research Council (854843-FASTCORR) , the ChinaScholarship Council (CSC) , eSSENCE, and STandUP is acknowledged. The computations/data handling were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputing Centre (NSC, Tetralith cluster) , partially funded by the Swedish Research Council through Grant Agreement No. 2016-07213.r Scholarship Council (CSC) , eSSENCE, and STandUP is acknowledged. The computations/data handling were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputing Cen-tre (NSC, Tetralith cluster) , partially funded by the Swedish Research Council through Grant Agreement No. 2016-07213.
2023-12-132023-12-132024-01-19Bibliographically approved