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Sequential magnetic switching in Fe/MgO(001) superlattices
Uppsala Univ, Sweden; Univ Iceland, Iceland.
Uppsala Univ, Sweden.
Uppsala Univ, Sweden.
Uppsala Univ, Sweden; Lund Univ, Sweden.
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2018 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 97, no 17, article id 174424Article in journal (Refereed) Published
Abstract [en]

Polarized neutron reflectometry is used to determine the sequence of magnetic switching in interlayer exchange coupled Fe/MgO(001) superlattices in an applied magnetic field. For 19.6 angstrom thick MgO layers we obtain a 90 degrees periodic magnetic alignment between adjacent Fe layers at remanence. In an increasing applied field the top layer switches first followed by its second-nearest neighbor. For 16.4 angstrom MgO layers, a 180 degrees periodic alignment is obtained at remanence and with increasing applied field the layer switching starts from the two outermost layers and proceeds inwards. This sequential tuneable switching opens up the possibility of designing three-dimensional magnetic structures with a predefined discrete switching sequence.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 97, no 17, article id 174424
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URN: urn:nbn:se:liu:diva-148382DOI: 10.1103/PhysRevB.97.174424ISI: 000433028500004OAI: oai:DiVA.org:liu-148382DiVA, id: diva2:1218981
Note

Funding Agencies|Swedish research council (VR); Knut and Alice Wallenberg foundation (KAW); Linkoping electron microscopy laboratory; Swedish Foundation for Strategic Research (SSF) through the Research Infrastructure Fellow Program [RIF-0074]

Available from: 2018-06-15 Created: 2018-06-15 Last updated: 2018-07-03

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