Temperature dependence of the IR mode frequency calculated from the volume data for DMNaFE

Alguel G., Enginer Y., Yurtseven H.

FERROELECTRICS, cilt.551, sa.1, ss.229-234, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 551 Sayı: 1
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1080/00150193.2019.1658049
  • Dergi Adı: FERROELECTRICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.229-234
  • Anahtar Kelimeler: Structural phase transition, IR mode frequencies, DMNaFe
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

We analyze the infrared (IR) frequencies of the internal mode of asymmetric close to phase transition in DMNaFe. By means of the mode Gruneisen parameter , the IR frequencies are calculated from the observed volume data given in the literature. Calculated frequencies are fitted to the observed data for both below and above as the varies with the temperature in the low and high temperature phases in this compound. Our results show that the critical behavior of the observed IR frequencies can be explained from the volume data to describe a first order structural phase transition in DMNaFe.