This article is cited in 4 papers

Proceedings of the XIX All-Russian Conference on Physics of Ferroelectrics (VKS-XIX) (Moscow, Russia, June 19-23, 2011

Infrared and ESR spectroscopy of KTaO$_3$ : Er

A. P. Skvortsov^a, V. Trepakov^ba, D. Nuzhnyi^b, V. Laguta^bc, L. Yastrabik<sup>b

a</sup> Ioffe Institute, St. Petersburg
^b Institute of Physics, Academy of Sciences of the Czech Republic, Praha 8, 182 21, Czech Republic
^c Institute of Materials Science Problems, National Academy of Sciences of Ukraine, Kiev

Abstract: Infrared reflection and ESR spectra of KTaO$_3$ : Er$^{3+}$ single crystals have been investigated. The frequency of the lowest optical phonon mode TO$_1$ has been found to increase as compared to undoped KTaO$_3$ crystals, which indicates the suppression of the ferroelectric instability of the system. The ESR spectra have revealed the presence of two Er$^{3+}$ centers of different (cubic and non-cubic) symmetries in KTaO$_3$ : Er$^{3+}$.

 English version: Physics of the Solid State, 2012, 54:5, 972–974

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