Infrared and ESR spectroscopy of KTaO3 : Er
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Infrared reflection and ESR spectra of KTaO3 : Er3+ single crystals have been investigated. The frequency of the lowest optical phonon mode TO1 has been found to increase as compared to undoped KTaO3 crystals, which indicates the suppression of the ferroelectric instability of the system. The ESR spectra have revealed the presence of two Er3+ centers of different (cubic and non-cubic) symmetries in KTaO3 : Er3+.
KeywordsElectron Spin Resonance Erbium Strontium Titanate Complex Dielectric Function Random Static Field
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- 4.F. Gervais, in Infrared and Millimeter Waves, Ed. by K. Y. Button (Academic Press, New York, 1983), Vol. 8, p. 280.Google Scholar