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Induced spin-polarization of EuS at room temperature in Ni/EuS multilayers
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: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 104, no 11, 112411- p.Article in journal (Refereed) Published
Abstract [en]

Ni/EuS multilayers with excellent multilayer sequencing are deposited via e-beam evaporation on the native oxide of Si(100) wafers at 4 x 10(-9) millibars. The samples have very small surface and interface roughness and show sharp interfaces. Ni layers are nanocrystalline 4-8 nm thick and EuS layers are 2-4 nm thick and are either amorphous or nanocrystalline. Unlike for Co/EuS multilayers, all Eu ions are in divalent (ferromagnetic) state. We show a direct antiferromagnetic coupling between EuS and Ni layers. At room temperature, the EuS layers are spin-polarized due to the proximity of Ni. Therefore, Ni/EuS is a candidate for room-temperature spintronics applications. (C) 2014 AIP Publishing LLC.

Place, publisher, year, edition, pages
2014. Vol. 104, no 11, 112411- p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-224466DOI: 10.1063/1.4869210ISI: 000333252300043OAI: oai:DiVA.org:uu-224466DiVA: diva2:717469
Available from: 2014-05-15 Created: 2014-05-13 Last updated: 2017-12-05Bibliographically approved

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Kapaklis, VassiliosWolff, MaxPappas, Spyridon D.

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