Magneto-optical studies of SrGa{sub 0.7} Co{sub 0.3} O{sub 3−δ} perovskite thin films with embedded cobalt nanoparticles

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4918783· OSTI ID:22409933

Zahradnik, M.; Ohnoutek, L.; Beran, L.; Kucera, M. ^[1]; Sun, Xue Yin; Zhang, Chen; Aimon, Nicolas M.; Goto, Taichi; Onbasli, Mehmet C.; Kim, Dong Hun; Choi, Hong Kyoon; Ross, C. A. ^[2]

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1. Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 12116 Prague (Czech Republic)
2. Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Sr(Ga{sub 0.7} Co{sub 0.3})O{sub 3−δ}/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) (LaAlO{sub 3}) {sub 0.3}(Sr{sub 2}AlTaO{sub 6}) {sub 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.

• OSTI ID: 22409933
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ALUMINATES
APPROXIMATIONS
COBALT
COBALT OXIDES
ENERGY BEAM DEPOSITION
FARADAY EFFECT
GALLIUM OXIDES
INTERFACES
KERR EFFECT
LANTHANUM COMPOUNDS
LASER RADIATION
MAGNETIC FIELDS
MAGNETO-OPTICAL EFFECTS
NANOPARTICLES
POLYCRYSTALS
SILICON
STRONTIUM COMPOUNDS
SUBSTRATES
THIN FILMS