Finite block pseudo-spin approach of proton glass

Kwang Sei Lee, Je Huan Koo, Cheol Eui Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We herein propose an alternative phenomenology to explain the phase of proton glass by reference to finite block spin theory in magnetism, in which the phase may be considered as being a short-range ferroelectric ordering of block pseudo-spins comprised of random pseudo-spins that have a majority of individual pseudo-spins in a given sense. By making use of the Curie law of block pseudo-spins, we obtained the dielectric susceptibility for the lower and higher temperature approximations of the Brillouin function. The experimental results for the susceptibility in hydrogen-bonded mixed crystals of ferroelectric RbH2P(As)O4 and antiferroelectric NH4H2P(As)O4 were thus fitted fairly well at low temperatures in the proton glass phase whereas some deviation from our formulation was seen at high temperatures in the paraelectric phase.

Original languageEnglish
Pages (from-to)10-14
Number of pages5
JournalSolid State Communications
Volume240
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • D. Dielectric properties
  • D. Ferroelectricity
  • D. Phase transitions

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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