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Complex magnetic structure of clusters and chains of Ni and Fe on Pt(111)
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory.
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2013 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 3, 3054- p.Article in journal (Refereed) Published
Abstract [en]

We present an approach to control the magnetic structure of adatoms adsorbed on a substrate having a high magnetic susceptibility. Using finite Ni-Pt and Fe-Pt nanowires and nanostructures on Pt(111) surfaces, our ab initio results show that it is possible to tune the exchange interaction and magnetic configuration of magnetic adatoms (Fe or Ni) by introducing different numbers of Pt atoms to link them, or by including edge effects. The exchange interaction between Ni (or Fe) adatoms on Pt(111) can be considerably increased by introducing Pt chains to link them. The magnetic ordering can be regulated allowing for ferromagnetic or antiferromagnetic configurations. Noncollinear magnetic alignments can also be stabilized by changing the number of Pt-mediated atoms. An Fe-Pt triangularly-shaped nanostructure adsorbed on Pt(111) shows the most complex magnetic structure of the systems considered here: a spin-spiral type of magnetic order that changes its propagation direction at the triangle vertices.

Place, publisher, year, edition, pages
2013. Vol. 3, 3054- p.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-211791DOI: 10.1038/srep03054ISI: 000326329000001OAI: oai:DiVA.org:uu-211791DiVA: diva2:668873
Funder
Swedish Research Council
Available from: 2013-12-02 Created: 2013-12-02 Last updated: 2017-12-06Bibliographically approved

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Sanyal, BiplabBergman, AndersEriksson, Olle

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