Pressure Dependence of Raman Spectra in Low Frequency Region of Ferroelastic NdNbO4

Kazuhiro Hara; Akikatsu Sawada; Yoshihiro Ishibashi

doi:10.1143/JPSJ.56.2187

Pressure Dependence of Raman Spectra in Low Frequency Region of Ferroelastic NdNbO₄

Kazuhiro Hara, Akikatsu Sawada, Yoshihiro Ishibashi

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

5 Citations (Scopus)

Abstract

Pressure dependence (up to ~ 80 Kbar) of optical modes in low frequency region of NdNbO₄ was investigated by Raman scattering measurements at room temperature. The Raman spectra of NdNbO₄ are found to be quite similar to those of isostructural LaNbO₄. With increasing pressure, the overlapped peaks of the lowest frequency in NdNbO₄ at atmospheric pressure, which are in the different symmetries each other, split around 30 Kbar. This behavior can be explained by the coupling of the optical mode and the order parameter x₆.

Original language	English
Pages (from-to)	2187-2191
Number of pages	5
Journal	journal of the physical society of japan
Volume	56
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.56.2187
Publication status	Published - Jan 1 1987
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1143/JPSJ.56.2187

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abstract = "Pressure dependence (up to ~ 80 Kbar) of optical modes in low frequency region of NdNbO4 was investigated by Raman scattering measurements at room temperature. The Raman spectra of NdNbO4 are found to be quite similar to those of isostructural LaNbO4. With increasing pressure, the overlapped peaks of the lowest frequency in NdNbO4 at atmospheric pressure, which are in the different symmetries each other, split around 30 Kbar. This behavior can be explained by the coupling of the optical mode and the order parameter x6.",

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AU - Hara, Kazuhiro

AU - Sawada, Akikatsu

AU - Ishibashi, Yoshihiro

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Y1 - 1987/1/1

N2 - Pressure dependence (up to ~ 80 Kbar) of optical modes in low frequency region of NdNbO4 was investigated by Raman scattering measurements at room temperature. The Raman spectra of NdNbO4 are found to be quite similar to those of isostructural LaNbO4. With increasing pressure, the overlapped peaks of the lowest frequency in NdNbO4 at atmospheric pressure, which are in the different symmetries each other, split around 30 Kbar. This behavior can be explained by the coupling of the optical mode and the order parameter x6.

AB - Pressure dependence (up to ~ 80 Kbar) of optical modes in low frequency region of NdNbO4 was investigated by Raman scattering measurements at room temperature. The Raman spectra of NdNbO4 are found to be quite similar to those of isostructural LaNbO4. With increasing pressure, the overlapped peaks of the lowest frequency in NdNbO4 at atmospheric pressure, which are in the different symmetries each other, split around 30 Kbar. This behavior can be explained by the coupling of the optical mode and the order parameter x6.

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Pressure Dependence of Raman Spectra in Low Frequency Region of Ferroelastic NdNbO₄

Abstract

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