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

Abstract

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.

Authors:
; ; ; ;  [1]; ; ; ; ; ; ; ;  [2]
  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)
Publication Date:
OSTI Identifier:
22409933
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Veis, M., E-mail: veis@karlov.mff.cuni.cz, Zahradnik, M., Ohnoutek, L., Beran, L., Kucera, M., Sun, Xue Yin, Zhang, Chen, Aimon, Nicolas M., Goto, Taichi, Onbasli, Mehmet C., Kim, Dong Hun, Choi, Hong Kyoon, and Ross, C. A. Magneto-optical studies of SrGa{sub 0.7} Co{sub 0.3} O{sub 3−δ} perovskite thin films with embedded cobalt nanoparticles. United States: N. p., 2015. Web. doi:10.1063/1.4918783.
Veis, M., E-mail: veis@karlov.mff.cuni.cz, Zahradnik, M., Ohnoutek, L., Beran, L., Kucera, M., Sun, Xue Yin, Zhang, Chen, Aimon, Nicolas M., Goto, Taichi, Onbasli, Mehmet C., Kim, Dong Hun, Choi, Hong Kyoon, & Ross, C. A. Magneto-optical studies of SrGa{sub 0.7} Co{sub 0.3} O{sub 3−δ} perovskite thin films with embedded cobalt nanoparticles. United States. doi:10.1063/1.4918783.
Veis, M., E-mail: veis@karlov.mff.cuni.cz, Zahradnik, M., Ohnoutek, L., Beran, L., Kucera, M., Sun, Xue Yin, Zhang, Chen, Aimon, Nicolas M., Goto, Taichi, Onbasli, Mehmet C., Kim, Dong Hun, Choi, Hong Kyoon, and Ross, C. A. Thu . "Magneto-optical studies of SrGa{sub 0.7} Co{sub 0.3} O{sub 3−δ} perovskite thin films with embedded cobalt nanoparticles". United States. doi:10.1063/1.4918783.
@article{osti_22409933,
title = {Magneto-optical studies of SrGa{sub 0.7} Co{sub 0.3} O{sub 3−δ} perovskite thin films with embedded cobalt nanoparticles},
author = {Veis, M., E-mail: veis@karlov.mff.cuni.cz and Zahradnik, M. and Ohnoutek, L. and Beran, L. and Kucera, M. and Sun, Xue Yin and Zhang, Chen and Aimon, Nicolas M. and Goto, Taichi and Onbasli, Mehmet C. and Kim, Dong Hun and Choi, Hong Kyoon and Ross, C. A.},
abstractNote = {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.},
doi = {10.1063/1.4918783},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}