The temperature dependence of the band edge energy in calcium barium niobate |
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| Authors: | Urs Heine Klaus Betzler Manfred Burianek Manfred Mühlberg |
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| Affiliation: | 1. Fachbereich Physik, Universit?t Osnabrück, 49069 Osnabrück, Germany;2. Institut für Kristallographie, Universit?t zu K?ln, 50674 K?ln, Germany |
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| Abstract: | The temperature dependent band edge energy of the novel tungsten bronze type calcium barium niobate (CBN) is measured over a temperature range from 80 K to 573 K. CBN has been under investigation for serveral years and is believed to be a promising material for future applications. Czochralski‐grown, colorless single crystals from the congruently melting composition with a calcium content of 0.281 were used. A numerical fit has been applied, comparing the results of CBN to those of the well known relaxor ferroelectric strontium barium niobate (SBN). The band edge energy of CBN was found to be higher than in SBN over the whole temperature range. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | calcium barium niobate band edge relaxor ferroelectrics absorption |
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