Magneto-optical studies of SrGa0.7 Co-0.3 O3-delta perovskite thin films with embedded cobalt nanoparticles

TitleMagneto-optical studies of SrGa0.7 Co-0.3 O3-delta perovskite thin films with embedded cobalt nanoparticles
Publication TypeJournal Article
Year of Publication2015
AuthorsVeis, M, Zahradnik, M, Ohnoutek, L, Beran, L, Kucera, M, Sun, XYin, Zhang, C, Aimon, NM, Goto, T, Onbasli, MC, Kim, DHun, Choi, HKyoon, Ross, CA
JournalJournal of Applied Physics
Volume117
Issue17
Pagination17A746
Date Published2015/05/07/
Abstract

Sr(Ga-0.7 Co-0.3)O3-delta/Co perovskite/metal thin films have been systematically studied by means of Faraday and Kerr magneto-optical spectroscopies. The samples were prepared by pulsed laser deposition on (001) (LaAlO3)(0.3)(Sr2AlTaO6)(0.7) (LSAT) and Si substrates, and grew as a perovskite matrix containing approximately 6% by volume of embedded metallic Co nanoparticles with diameter less than 20 nm, which were distributed throughout the film and at the film-substrate interface. The film thickness ranged from 130 to 310 nm. The perovskite matrix was single crystal on LSAT and polycrystalline on Si. The magneto-optical spectroscopy was carried out in both Faraday and Kerr configurations in the photon energy range from 0.5 to 5 eV in magnetic fields sufficient for sample saturation, showing a strong thickness dependence of the magneto-optical effect. This dependence was attributed to the different metallic Co content, nanoparticle size, and accumulation at the film-substrate interface. (C) 2015 AIP Publishing LLC.