Phonon Properties of Co:TiO2 Single Crystal

Setiadi, H. and Prasetyo, Anton and Suendo, V. and Nugroho, Agustinus Agung (2015) Phonon Properties of Co:TiO2 Single Crystal. Materials Science Forum, 827. pp. 360-365. ISSN 1662-9752

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Full text available at: http://doi.org/10.4028/www.scientific.net/MSF.827....

Abstract

Phonon properties of cobalt doped rutile TiO2 single crystal was investigated using a Raman Spectrometer with laser wavelength at 532 nm in the temperature range from 140 K to 750 K. The phonon modes of B1g, Eg, and A1g with the energy of 140 cm-1, 450 cm-1 and 600 cm-1 are clearly observed. The second order phonon process is also observed at the energy of 250 cm-1. The temperature dependence of the A1g, Eg modes become stiffen as lowering the temperature, while the B1g mode becomes soften. The temperature dependence of the B1g is found to be a signature as the effect of doping. Based on the harmonic model, this is explained due to the change the Ti-O coupling strengths of TiO6 octahedral. A larger change is found for the longer distance of the Ti-O bond. © (2015) Trans Tech Publications, Switzerland.

Item Type: Journal Article
Keywords: Anharmonicity; Co-doped rutile TiO2; Phonon; Functional materials; Oxide minerals; Phonons; Temperature distribution; Titanium dioxide, Anharmonicities; Co-doped; Coupling strengths; Doped rutile TiO; Phonon properties; Raman spectrometers; Temperature dependence; Temperature range; Single crystals
Divisions: Faculty of Mathematics and Sciences > Department of Chemistry
Depositing User: Faizuddin Harliansyah
Date Deposited: 24 May 2018 10:28

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