SrGa0.7Co0.3O3-delta perovskite-cobalt oxide-metal nanocomposite films: magnetic and optical properties

TitleSrGa0.7Co0.3O3-delta perovskite-cobalt oxide-metal nanocomposite films: magnetic and optical properties
Publication TypeJournal Article
Year of Publication2015
AuthorsSun, XYin, Veis, M, Kousal, J, Jesenska, E, Zhang, C, Aimon, NM, Goto, T, Onbasli, MC, Kim, DHun, Choi, HKyoon, Ross, CA
JournalNanotechnology
Volume26
Issue11
Pagination115701
Date Published2015/03/20/
Abstract

Two-phase nanocomposite films consisting of metallic Co nanoparticles below 50 nm diameter in a perovskite matrix were grown by pulsed laser deposition onto (LaAlO3)(0.3)(Sr2AlTaO6)(0.7) (LSAT) and silicon substrates from a target of SrGa0.73Co0.27O3. The particles made up about 6% by volume of the film and were present within the film and at the substrate interface. The saturation magnetization of the film was up to 85 emu cm(-3) at 80 nm thickness and the Faraday rotation (FR) tracked the out-of-plane hysteresis loop, reaching 3000 deg cm(-1) at 10 kOe for 1550 nm wavelength. The magneto-optical figure of merit defined as FR divided by optical absorption was 0.04-0.06 deg dB(-1) due to the high optical absorption of the Co particles.