Low-temperature characterization of domain wall dynamics and electrical conduction in a proton-irradiated K(H0.21D0.79)2PO4 system

Cheol Eui Lee, Byoung Hoo Oh, Se Hun Kim

Research output: Contribution to journalArticle

Abstract

We investigated the longitudinal electrical conductivity associated with the domain-wall dynamics in proton-irradiated K(H0.21D0.79)2PO4 single crystals a temperatures below room temperature. Frequency-dependent longitudinal dielectric-loss measurements allowed us to investigate the changes in the domain-wall dynamics of the proton-irradiated crystal with a ferroelectric phase-transition temperature increase of 8 K. Using the Vogel-Fulcher function, we found that proton irradiation produced a slight increase in the activation energy of domain freezing. The temperature dependence of the power-law exponent n in frequency-dependent electrical conductivity in proton-conducting systems decreased at temperatures near the phase-transition temperature Tc2. In addition, the temperature dependence of the electrical conductivity shifted to higher temperatures because of the increased phase-transition temperature arising from the proton irradiation.

Original languageEnglish
Pages (from-to)232-236
Number of pages5
JournalNew Physics: Sae Mulli
Volume67
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1

Keywords

  • Defects
  • Dielectric properties
  • Impedance spectroscopy
  • Ionic conductivity
  • Radiation damage

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Low-temperature characterization of domain wall dynamics and electrical conduction in a proton-irradiated K(H<sub>0.21</sub>D<sub>0.79</sub>)<sub>2</sub>PO<sub>4</sub> system'. Together they form a unique fingerprint.

  • Cite this