Spectroscopic modifications of the Pippard relations for NaNO2 in the sinusoidal antiferroelectric phase

Date

2002-06-01

Author

Tari, O
Yurtseven, Hasan Hamit

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We establish in this study a linear variation of the specific heat C-p with the frequency shifts (1/nu)(partial derivativenu/partial derivativeT) in the sinusoidal antiferroelectric phase of NaNO2, according to the first Pippard relation which we have modified spectroscopically. For this linear relationship we use the Brillouin frequencies of acoustic phonon modes for the q[010], q[001] and q[100] modes of NaNO2 in the sinusoidal antiferroelectric phase. We then calculate dT/dP values due to those modes studied for NaNO2, which agree with the literature values.

Subject Keywords

Pippard relations, Brillouin frequency, NaNO2, Antiferroelectric phase

URI

https://hdl.handle.net/11511/56707

Journal

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

DOI

https://doi.org/10.1016/s1386-1425(01)00615-1

Collections

Department of Physics, Article

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Application of the spectroscopic modifications of Pippard relations to NaNO2 in the ferroelectric phase Yurtseven, Hasan Hamit (2001-01-01) This study examines a linear variation of the specific heat C-P with the frequency shifts 1/nu(partial derivative nu/partial derivativeT) for the Brillouin frequencies of the L-mode [010], [001] and [100] in the ferroelectric phase of NaNO2 according to our spectroscopically modified Pippard relation. We obtain this linear relationship for those modes studied and calculate dT(C)/dP in the ferroelectric phase of NaNO2. Our calculated values of dT(C)/dP for the [001] and [100] modes are in good agreement with...
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Ultrasonic frequency shifts close to the first order and tricritical phase transitions in NH4Cl Yurtseven, Hasan Hamit; Bas, M (2001-12-01) This study examines our spectroscopic modifications of the Pippard relations using the ultrasonic frequencies of the q[110] and q[1 (1) over bar0] modes for the first order phase transition in NH4Cl. We also examine our relations using the ultrasonic frequencies of the q[110] mode for the tricritical phase transition in this crystal. From our plots of the specific heat C-p as a function of the frequency shifts (1/nu)(partial derivative nu/partial derivativeT)(p), we obtain that our spectroscopically modifie...

Citation Formats

O. Tari and H. H. Yurtseven, “Spectroscopic modifications of the Pippard relations for NaNO2 in the sinusoidal antiferroelectric phase,” SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, pp. 1615–1621, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56707.