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Magnetic Properties of Fe/WRe (001) Multilayers
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Materialfysik, MF.ORCID-id: 0000-0002-9375-6346
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2014 (engelsk)Inngår i: Journal of Surfaces and Interfaces of Materials, ISSN 2164-7542, Vol. 2, nr 1, s. 33-39Artikkel i tidsskrift (Fagfellevurdert) 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.

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American Scientific Publishers, 2014. Vol. 2, nr 1, s. 33-39
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URN: urn:nbn:se:kth:diva-162908DOI: 10.1166/jsim.2014.1033OAI: oai:DiVA.org:kth-162908DiVA, id: diva2:797929
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Qc 20150410

Tilgjengelig fra: 2015-03-25 Laget: 2015-03-25 Sist oppdatert: 2017-01-13bibliografisk kontrollert

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