Heterogeneous and Homogeneous Diffusivity in an Ion-Conducting Glass

Ranko Richert, Roland Böhmer

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

The nature of ion diffusivity in the vitreous conductor 2Ca(NO3)2 · 3KNO3 (CKN) was studied by nonresonant dielectric hole burning. Spectral holes in the electric field relaxation are probed subsequent to a high electric sinusoidal burn field. For sufficiently high pump frequencies we are able to induce spectrally selective modifications in the relaxation of the electric modulus, indicating that ionic diffusivity is a spatially varying quantity in glassy CKN. Homogeneous behavior occurs in the regime of low pump frequencies, in which the resistivity approaches its steady state value. Thus, longer-ranged ionic motions lead to a spatial averaging over the heterogeneity of local ion diffusivities.

Original languageEnglish (US)
Pages (from-to)4337-4340
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number21
StatePublished - Nov 22 1999

Fingerprint

diffusivity
conduction
glass
pumps
ions
hole burning
conductors
electrical resistivity
electric fields

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Heterogeneous and Homogeneous Diffusivity in an Ion-Conducting Glass. / Richert, Ranko; Böhmer, Roland.

In: Physical Review Letters, Vol. 83, No. 21, 22.11.1999, p. 4337-4340.

Research output: Contribution to journalArticle

@article{1afd0bf2544d4ccb82dfbb52d3c4c819,
title = "Heterogeneous and Homogeneous Diffusivity in an Ion-Conducting Glass",
abstract = "The nature of ion diffusivity in the vitreous conductor 2Ca(NO3)2 · 3KNO3 (CKN) was studied by nonresonant dielectric hole burning. Spectral holes in the electric field relaxation are probed subsequent to a high electric sinusoidal burn field. For sufficiently high pump frequencies we are able to induce spectrally selective modifications in the relaxation of the electric modulus, indicating that ionic diffusivity is a spatially varying quantity in glassy CKN. Homogeneous behavior occurs in the regime of low pump frequencies, in which the resistivity approaches its steady state value. Thus, longer-ranged ionic motions lead to a spatial averaging over the heterogeneity of local ion diffusivities.",
author = "Ranko Richert and Roland B{\"o}hmer",
year = "1999",
month = "11",
day = "22",
language = "English (US)",
volume = "83",
pages = "4337--4340",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "21",

}

TY - JOUR

T1 - Heterogeneous and Homogeneous Diffusivity in an Ion-Conducting Glass

AU - Richert, Ranko

AU - Böhmer, Roland

PY - 1999/11/22

Y1 - 1999/11/22

N2 - The nature of ion diffusivity in the vitreous conductor 2Ca(NO3)2 · 3KNO3 (CKN) was studied by nonresonant dielectric hole burning. Spectral holes in the electric field relaxation are probed subsequent to a high electric sinusoidal burn field. For sufficiently high pump frequencies we are able to induce spectrally selective modifications in the relaxation of the electric modulus, indicating that ionic diffusivity is a spatially varying quantity in glassy CKN. Homogeneous behavior occurs in the regime of low pump frequencies, in which the resistivity approaches its steady state value. Thus, longer-ranged ionic motions lead to a spatial averaging over the heterogeneity of local ion diffusivities.

AB - The nature of ion diffusivity in the vitreous conductor 2Ca(NO3)2 · 3KNO3 (CKN) was studied by nonresonant dielectric hole burning. Spectral holes in the electric field relaxation are probed subsequent to a high electric sinusoidal burn field. For sufficiently high pump frequencies we are able to induce spectrally selective modifications in the relaxation of the electric modulus, indicating that ionic diffusivity is a spatially varying quantity in glassy CKN. Homogeneous behavior occurs in the regime of low pump frequencies, in which the resistivity approaches its steady state value. Thus, longer-ranged ionic motions lead to a spatial averaging over the heterogeneity of local ion diffusivities.

UR - http://www.scopus.com/inward/record.url?scp=17744412209&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17744412209&partnerID=8YFLogxK

M3 - Article

VL - 83

SP - 4337

EP - 4340

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 21

ER -