The influence of uniaxial compressive stress on the phase transitions and dielectric properties of NaNO2

Mir Hasan Yu Seyidov*, Faik A. Mikailzade, Rauf A. Suleymanov, Nebahat Bulut, Ferid Salehli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The effect of uniaxial stress on dielectric properties of sodium nitrite (NaNO2) ferroelectric has been investigated. The real part of the dielectric susceptibility was measured at the frequency of 1 kHz without and on applying compressive uniaxial stress along different crystallographic directions using a uniaxial compress meter. Extraordinary changes in the dielectric constant of NaNO2 under the influence of applied uniaxial stresses were observed for the first time. The shifts of the phase transition points Ti and Tc under the uniaxial stresses σyy and σzz were investigated. The "uniaxial pressure-temperature" phase diagram of NaNO2 was obtained from these results. The observed phenomena were interpreted on the base of the phenomenological Landau theory of phase transitions in NaNO2 by taking into account the uniaxial compressive stress effect. A best agreement between the theoretical predictions and experimental results has been revealed.

Original languageEnglish
Pages (from-to)22-26
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume93
DOIs
Publication statusPublished - 1 Jun 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd. All rights reserved.

Keywords

  • Dielectric properties
  • Ferroelectrics
  • Phase transitions
  • Uniaxial stress

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