Impedance spectroscopy of ionic conduction in hydrogen-bonded TlH 2PO 4

Se Hun Kim, Kyu Won Lee, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


TlH 2PO 4, a hydrogen-bonded ferroelectric, was investigated by AC impedance measurements at various temperatures. Both the real and the imaginary impedance values showed anomalous behaviors at the ferroelastic-paraelastic transition. On the complex impedance plane, the Cole-Cole plots evolved into two regions with increasing temperature. The low-frequency region shows Warburg impedance (n ∼ 0.5), as in the case of surface conduction in solid electrolytes. The high-frequency conduction mechanism appears to be proton ionic transport in the bulk, The proton conduction for TlH 2PO 4 consists of two-phase elements, corresponding to a glass-like surface region and a normal bulk region.

Original languageEnglish
Pages (from-to)242-244
Number of pages3
JournalJournal of the Korean Physical Society
Issue number1
Publication statusPublished - 2005 Jan


  • Hydrogen bond
  • Proton conductor
  • TlH PO

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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