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Spin relaxation signature of colossal magnetic anisotropy in platinum atomic chains
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
KTH Royal Inst Technol, Sch Informat & Commun Technol, Dept Mat & Nano Phys, Electrum 229, SE-16440 Kista, Sweden..
KTH Royal Inst Technol, Sch Informat & Commun Technol, Dept Mat & Nano Phys, Electrum 229, SE-16440 Kista, Sweden.;Univ Iceland, Inst Sci, VR 3, IS-107 Reykjavik, Iceland..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. KTH Royal Inst Technol, Sch Informat & Commun Technol, Dept Mat & Nano Phys, Electrum 229, SE-16440 Kista, Sweden.;KTH Royal Inst Technol, Swedish E Sci Res Ctr SeRC, SE-10044 Stockholm, Sweden..
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, article id 36872Article in journal (Refereed) Published
Abstract [en]

Recent experimental data demonstrate emerging magnetic order in platinum atomically thin nanowires. Furthermore, an unusual form of magnetic anisotropy-colossal magnetic anisotropy (CMA)-was earlier predicted to exist in atomically thin platinum nanowires. Using spin dynamics simulations based on first-principles calculations, we here explore the spin dynamics of atomically thin platinum wires to reveal the spin relaxation signature of colossal magnetic anisotropy, comparing it with other types of anisotropy such as uniaxial magnetic anisotropy (UMA). We find that the CMA alters the spin relaxation process distinctly and, most importantly, causes a large speed-up of the magnetic relaxation compared to uniaxial magnetic anisotropy. The magnetic behavior of the nanowire exhibiting CMA should be possible to identify experimentally at the nanosecond time scale for temperatures below 5 K. This time-scale is accessible in e.g., soft x-ray free electron laser experiments.

Place, publisher, year, edition, pages
2016. Vol. 6, article id 36872
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-309800DOI: 10.1038/srep36872ISI: 000387564100001PubMedID: 27841287OAI: oai:DiVA.org:uu-309800DiVA, id: diva2:1056576
Funder
Swedish Research CouncilThe Royal Swedish Academy of SciencesKnut and Alice Wallenberg FoundationSwedish Energy AgencySwedish Foundation for Strategic Research Carl Tryggers foundation eSSENCE - An eScience CollaborationGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology
Available from: 2016-12-15 Created: 2016-12-07 Last updated: 2017-11-29Bibliographically approved

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