Dielectric, ionic conductivity and structural phase transitions studies of (NH4)3H(SO4)2 crystal

R. H. Chen, T. M. Chen, Ching-Song Shern

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The temperature and frequency dependent complex impedance of (NH4)3H(SO4)2 crystals was measured. The measurements have been performed in the temperature range from 27 to 220 °C along the c*-axis of the room temperature phase. AC frequencies between 100 Hz and 5 MHz were applied. The crystals investigated in this work revealed two structural phase transitions above room temperature. The crystal becomes a fast ionic conductor in both the high temperature phases. The dielectric properties of the sample crystal in different phases were analyzed. The behavior of protonic conduction was explained by means of a power law σ′(ω) = σ(0)+Bω+s$/, where ω is the frequency of the applied AC electric field. The exponent s, decreases from 0.7 to 0.3 with increasing temperature for the room temperature phase but becomes almost constant (≤0.1) in the fast ionic phases. Both, the electrical conductivity and relaxation appear to be thermally activated.

Original languageEnglish
Pages (from-to)1399-1406
Number of pages8
JournalJournal of Physics and Chemistry of Solids
Volume61
Issue number9
DOIs
Publication statusPublished - 2000 Jan 1

Fingerprint

Ionic conductivity
ion currents
Phase transitions
Crystals
crystals
alternating current
room temperature
Temperature
temperature
dielectric properties
conductors
transition temperature
exponents
impedance
conduction
electrical resistivity
electric fields
letovicite
Dielectric properties
Electric fields

ASJC Scopus subject areas

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

Cite this

Dielectric, ionic conductivity and structural phase transitions studies of (NH4)3H(SO4)2 crystal. / Chen, R. H.; Chen, T. M.; Shern, Ching-Song.

In: Journal of Physics and Chemistry of Solids, Vol. 61, No. 9, 01.01.2000, p. 1399-1406.

Research output: Contribution to journalArticle

@article{4117a3235063447599a07bfbd6c8485b,
title = "Dielectric, ionic conductivity and structural phase transitions studies of (NH4)3H(SO4)2 crystal",
abstract = "The temperature and frequency dependent complex impedance of (NH4)3H(SO4)2 crystals was measured. The measurements have been performed in the temperature range from 27 to 220 °C along the c*-axis of the room temperature phase. AC frequencies between 100 Hz and 5 MHz were applied. The crystals investigated in this work revealed two structural phase transitions above room temperature. The crystal becomes a fast ionic conductor in both the high temperature phases. The dielectric properties of the sample crystal in different phases were analyzed. The behavior of protonic conduction was explained by means of a power law σ′(ω) = σ(0)+Bω+s$/, where ω is the frequency of the applied AC electric field. The exponent s, decreases from 0.7 to 0.3 with increasing temperature for the room temperature phase but becomes almost constant (≤0.1) in the fast ionic phases. Both, the electrical conductivity and relaxation appear to be thermally activated.",
author = "Chen, {R. H.} and Chen, {T. M.} and Ching-Song Shern",
year = "2000",
month = "1",
day = "1",
doi = "10.1016/S0022-3697(00)00019-6",
language = "English",
volume = "61",
pages = "1399--1406",
journal = "Journal of Physics and Chemistry of Solids",
issn = "0022-3697",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - Dielectric, ionic conductivity and structural phase transitions studies of (NH4)3H(SO4)2 crystal

AU - Chen, R. H.

AU - Chen, T. M.

AU - Shern, Ching-Song

PY - 2000/1/1

Y1 - 2000/1/1

N2 - The temperature and frequency dependent complex impedance of (NH4)3H(SO4)2 crystals was measured. The measurements have been performed in the temperature range from 27 to 220 °C along the c*-axis of the room temperature phase. AC frequencies between 100 Hz and 5 MHz were applied. The crystals investigated in this work revealed two structural phase transitions above room temperature. The crystal becomes a fast ionic conductor in both the high temperature phases. The dielectric properties of the sample crystal in different phases were analyzed. The behavior of protonic conduction was explained by means of a power law σ′(ω) = σ(0)+Bω+s$/, where ω is the frequency of the applied AC electric field. The exponent s, decreases from 0.7 to 0.3 with increasing temperature for the room temperature phase but becomes almost constant (≤0.1) in the fast ionic phases. Both, the electrical conductivity and relaxation appear to be thermally activated.

AB - The temperature and frequency dependent complex impedance of (NH4)3H(SO4)2 crystals was measured. The measurements have been performed in the temperature range from 27 to 220 °C along the c*-axis of the room temperature phase. AC frequencies between 100 Hz and 5 MHz were applied. The crystals investigated in this work revealed two structural phase transitions above room temperature. The crystal becomes a fast ionic conductor in both the high temperature phases. The dielectric properties of the sample crystal in different phases were analyzed. The behavior of protonic conduction was explained by means of a power law σ′(ω) = σ(0)+Bω+s$/, where ω is the frequency of the applied AC electric field. The exponent s, decreases from 0.7 to 0.3 with increasing temperature for the room temperature phase but becomes almost constant (≤0.1) in the fast ionic phases. Both, the electrical conductivity and relaxation appear to be thermally activated.

UR - http://www.scopus.com/inward/record.url?scp=0033700969&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033700969&partnerID=8YFLogxK

U2 - 10.1016/S0022-3697(00)00019-6

DO - 10.1016/S0022-3697(00)00019-6

M3 - Article

AN - SCOPUS:0033700969

VL - 61

SP - 1399

EP - 1406

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 9

ER -