Optical and magneto-optical properties of Co–SiOx thin films

The optical and magneto-optical properties of hybrid Co–SiO x systems are studied as a function of Co concentration. The structures were prepared by alternate depositions of SiO x thin films and layers of 10-nm-diameter Co nanoparticles produced by an Ion Cluster Source. Both optical and magneto-opt...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2011-06, Vol.13 (6), p.2653-2659
Main Authors: Fermento, R., González-Díaz, J. B., Cebollada, A., Armelles, G., Díaz, M., Martínez, L., Román, E., Huttel, Y., Ballesteros, C.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Inorganic Chemistry
Lasers
Materials Science
Nanotechnology
Optical Devices
Optics
Photonics
Physical Chemistry
Research Paper
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Summary:The optical and magneto-optical properties of hybrid Co–SiO x systems are studied as a function of Co concentration. The structures were prepared by alternate depositions of SiO x thin films and layers of 10-nm-diameter Co nanoparticles produced by an Ion Cluster Source. Both optical and magneto-optical constants of the system gradually increase with the amount of Co, though maintaining low optical absorption values in the visible range. The experimental results are well reproduced assuming that the nanoparticles have a cobalt core (7–8 nm in diameter) surrounded by a cobalt oxide shell (1–2 nm thick). The magneto-optical activity versus optical absorption figure of merit of this system is compared with other magneto-optical dielectric systems.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-010-0158-1