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


Tari O., Yurtseven H.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, cilt.58, ss.1615-1621, 2002 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 58 Konu: 8
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1016/s1386-1425(01)00615-1
  • Dergi Adı: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
  • Sayfa Sayıları: ss.1615-1621

Özet

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. (C) 2002 Elsevier Science B.V. All rights reserved.