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Proximity effects on dimensionality and magnetic ordering in Pd/Fe/Pd trialyers
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
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2014 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 90, no 10, 104403- p.Article in journal (Refereed) Published
Abstract [en]

The element-specific magnetization and ordering in trilayers consisting of 0.3-1.4 monolayer (ML) thick Fe layers embedded in Pd(001) has been determined using x-ray resonant magnetic scattering. The proximity to Fe induces a large moment in the Pd which extends similar to 2 nm from the interfaces. The magnetization as a function of temperature is found to differ significantly for the Fe and Pd sublattices: The Pd signal resembles the results obtained by magneto-optical techniques with an apparent three-dimensional (3D) to two-dimensional (2D) transition in spatial dimensionality for Fe thickness below similar to 1 ML. In stark contrast, the Fe data exhibits a 2D behavior. No ferromagnetic signal is obtained from Fe below the 2D percolation limit in Fe coverage (similar to 0.7 ML), while Pd shows a ferromagnetic response for all samples. The results are attributed to the temperature dependence of the susceptibility of Pd and a profound local anisotropy of submonolayered Fe.

Place, publisher, year, edition, pages
2014. Vol. 90, no 10, 104403- p.
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Condensed Matter Physics
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URN: urn:nbn:se:uu:diva-232988DOI: 10.1103/PhysRevB.90.104403ISI: 000341239100007OAI: oai:DiVA.org:uu-232988DiVA: diva2:755067
Available from: 2014-10-13 Created: 2014-09-29 Last updated: 2017-12-05Bibliographically approved

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Arnalds, Unnar B.Ahlberg, MartinaKapaklis, VassiliosBjörck, MattsHjörvarsson, Björgvin

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