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

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domain wall
proton irradiation
transition temperature
conduction
electrical resistivity
protons
temperature dependence
dielectric loss
freezing
exponents
activation energy
temperature
single crystals
room temperature
crystals

Keywords

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

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Low-temperature characterization of domain wall dynamics and electrical conduction in a proton-irradiated K(H0.21D0.79)2PO4 system. / Lee, Cheol Eui; Oh, Byoung Hoo; Kim, Se Hun.

In: New Physics: Sae Mulli, Vol. 67, No. 2, 01.02.2017, p. 232-236.

Research output: Contribution to journalArticle

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