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Magnetic Properties of Fe/WRe (001) Multilayers
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Material Physics, MF.ORCID iD: 0000-0002-9375-6346
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2014 (English)In: Journal of Surfaces and Interfaces of Materials, Vol. 2, no 1, 33-39 p.Article in journal (Refereed) Published
Abstract [en]

Following recent theoretical predictions on perpendicular uniaxial magnetocrystalline anisotropy in multilayers of 5 monolayers of Fe and 2 monolayers of W<sub> <i>x</i> </sub>Re<sub>100&#8211;<i>x</i> </sub> with tetragonally strained components, we have measured the magnetization and detailed atomic structure in a series of such samples with <i>x</i> = 20&#8211;80 at%. Although the achieved strain in the WRe layers is smaller than in the modelled case, we do observe a positive uniaxial magnetocrystalline anisotropy of around 0.6 MJ/m<sup>3</sup> at 40 K, after accounting for the in-plane shape anisotropy. This causes the out-of-plane saturation field to be reduced considerably compared to a pure Fe thin film, while the saturation magnetization is maintained at a value which is enhanced by at least 30% from what would be expected from the multilayer composition alone. The coercivity is low, on the order of 6 kA/m in all samples.

Place, publisher, year, edition, pages
2014. Vol. 2, no 1, 33-39 p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-162908DOI: 10.1166/jsim.2014.1033OAI: diva2:797929

Qc 20150410

Available from: 2015-03-25 Created: 2015-03-25 Last updated: 2015-04-10Bibliographically approved

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Hudl, Matthias
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Material Physics, MF
Condensed Matter Physics

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