Abstract.
Using electron paramagnetic resonance, optical absorption, and fast spectroscopy of light-induced absorption changes, it is shown that codoping BaTiO3:Rh with NaBa acceptors raises the charge state of Rh3+ to Rh4+. Subsequent oxidation under high oxygen pressures can lower the Fermi level to Rh4+/5+, leading to increased infrared absorption. The light-induced charge transfer in such specimens is characterised by “one center” behaviour.
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Received: 18 November 1998 / Revised version: 23 December 1998 / Published online: 7 April 1999
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Scharfschwerdt, R., Schirmer, O., Hesse, H. et al. Fermi-level engineering of BaTiO3 by alkali codoping: increasing the near-infrared absorption by rhodium . Appl Phys B 68, 807–812 (1999). https://doi.org/10.1007/s003400050708
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DOI: https://doi.org/10.1007/s003400050708