Induced spin-polarization of EuS at room temperature in Ni/EuS multilayers
2014 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 104, no 11, 112411- p.Article in journal (Refereed) Published
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.
IdentifiersURN: urn:nbn:se:uu:diva-224466DOI: 10.1063/1.4869210ISI: 000333252300043OAI: oai:DiVA.org:uu-224466DiVA: diva2:717469