Pressure dependence of the impurity soft modes in Li and Na: KTaO3

Y. Yacoby; W. B. Holzapfel; D. Bäuerle

doi:10.1016/0038-1098(77)90722-0

Pressure dependence of the impurity soft modes in Li and Na: KTaO₃

Y. Yacoby^*, W. B. Holzapfel, D. Bäuerle

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Low energy Raman scattering measurements on samples of K_0.76Na_0.24TaO₃, K_0.9Na_0.1TaO₃ and K_0.75Li_0.25TaO₃ under hydrostatic pressures of up to 60 kbar supply confirming evidence to the hypothesis that the Na⁺ ions in these crystals are displaced from the centers of the sites they occupy. The pressure Raman experiments also reveal another second order Raman line interpreted as Raman scattering by two TA phonons at M. A line induced by the substitution of Na for K is found to have an energy about equal to the energy of this new second order Raman line. It is shown that if this is a resonant mode it must be an even mode.

Original language	English
Pages (from-to)	947-950
Number of pages	4
Journal	Solid State Communications
Volume	23
Issue number	12
DOIs	https://doi.org/10.1016/0038-1098(77)90722-0
State	Published - Sep 1977
Externally published	Yes

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title = "Pressure dependence of the impurity soft modes in Li and Na: KTaO3",

abstract = "Low energy Raman scattering measurements on samples of K0.76Na0.24TaO3, K0.9Na0.1TaO3 and K0.75Li0.25TaO3 under hydrostatic pressures of up to 60 kbar supply confirming evidence to the hypothesis that the Na+ ions in these crystals are displaced from the centers of the sites they occupy. The pressure Raman experiments also reveal another second order Raman line interpreted as Raman scattering by two TA phonons at M. A line induced by the substitution of Na for K is found to have an energy about equal to the energy of this new second order Raman line. It is shown that if this is a resonant mode it must be an even mode.",

author = "Y. Yacoby and Holzapfel, {W. B.} and D. B{\"a}uerle",

year = "1977",

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doi = "10.1016/0038-1098(77)90722-0",

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journal = "Solid State Communications",

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T1 - Pressure dependence of the impurity soft modes in Li and Na

T2 - KTaO3

AU - Yacoby, Y.

AU - Holzapfel, W. B.

AU - Bäuerle, D.

PY - 1977/9

Y1 - 1977/9

N2 - Low energy Raman scattering measurements on samples of K0.76Na0.24TaO3, K0.9Na0.1TaO3 and K0.75Li0.25TaO3 under hydrostatic pressures of up to 60 kbar supply confirming evidence to the hypothesis that the Na+ ions in these crystals are displaced from the centers of the sites they occupy. The pressure Raman experiments also reveal another second order Raman line interpreted as Raman scattering by two TA phonons at M. A line induced by the substitution of Na for K is found to have an energy about equal to the energy of this new second order Raman line. It is shown that if this is a resonant mode it must be an even mode.

AB - Low energy Raman scattering measurements on samples of K0.76Na0.24TaO3, K0.9Na0.1TaO3 and K0.75Li0.25TaO3 under hydrostatic pressures of up to 60 kbar supply confirming evidence to the hypothesis that the Na+ ions in these crystals are displaced from the centers of the sites they occupy. The pressure Raman experiments also reveal another second order Raman line interpreted as Raman scattering by two TA phonons at M. A line induced by the substitution of Na for K is found to have an energy about equal to the energy of this new second order Raman line. It is shown that if this is a resonant mode it must be an even mode.

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JO - Solid State Communications

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Pressure dependence of the impurity soft modes in Li and Na: KTaO₃

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