Proximity effects on dimensionality and magnetic ordering in Pd/Fe/Pd trialyers
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
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.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-232988DOI: 10.1103/PhysRevB.90.104403ISI: 000341239100007OAI: oai:DiVA.org:uu-232988DiVA: diva2:755067