Oxygen partial pressure dependence of magnetic, optical and magneto-optical properties of epitaxial cobalt-substituted SrTiO3 films
Date
2015
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Source Title
Optics Express
Print ISSN
10944087
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Publisher
OSA - The Optical Society
Volume
23
Issue
10
Pages
13399 - 13409
Language
English
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Journal Title
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Abstract
Cobalt-substituted SrTiO3 films (SrTi0.70Co0.30O3-δ) were grown on SrTiO3 substrates using pulsed laser deposition under oxygen pressures ranging from 1 μTorr to 20 mTorr. The effect of oxygen pressure on structural, magnetic, optical, and magneto-optical properties of the films was investigated. The film grown at 3 μTorr has the highest Faraday rotation (FR) and magnetic saturation moment (Ms). Increasing oxygen pressure during growth reduced Ms, FR and optical absorption in the nearinfrared. This trend is attributed to decreasing Co2+ ion concentration and oxygen vacancy concentration with higher oxygen partial pressure during growth. © 2015 Optical Society of America.
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Keywords
Cobalt , Cobalt compounds , Electromagnetic wave absorption , Light absorption , Magnetism , Optical properties , Oxygen , Oxygen vacancies , Partial pressure , Pulsed laser deposition , Strontium titanates , Effect of oxygen , Ion concentrations , Magnetooptical properties , Optical and magneto-optical properties , Oxygen partial pressure , Oxygen pressure , Oxygen vacancy concentration , SrTiO3 substrates , Optical films