Ferroelectric domain freezing and charge conduction in proton-irradiated K(H0.36D0.64)2PO4

Se Hun Kim, B. H. Oh, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review


We have studied the effects of proton irradiation in K(H0.36D0.64)2PO4 single crystals by employing impedance spectroscopy. Frequency-dependent dielectric loss measurements allowed us to investigate changes in the domain wall dynamics of a proton-irradiated crystal with a ferroelectric phase transition temperature raised by 5 K. Thus, the increase caused by proton irradiation in the activation energy of the domain freezing in the direction of the hydrogen bonds was found to be significantly greater than in the case of KH2PO4. Furthermore, the temperature dependence of the power-law exponent n in the frequency-dependent electrical conductivity in the proton-conducting systems manifested changes arising from the proton irradiation in the interactions between the mobile ionic (proton) charges and their environments.

Original languageEnglish
Pages (from-to)547-550
Number of pages4
JournalJournal of the Korean Physical Society
Issue number4
Publication statusPublished - 2016 Aug 1


  • Electrical conduction
  • Ferroelectric domain freezing
  • K(HD)PO
  • Proton irradiation

ASJC Scopus subject areas

  • General Physics and Astronomy


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