Two contributions to the ac conductivity of alkali oxide glasses

Journal Article · Mon Jun 19 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.74.5068· OSTI ID:69587

Sidebottom, D L; Green, P F; Brow, R K ^[1]

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1. Department 1845, Sandia National Laboratories, Albuquerque, New Mexico 87185-0607 (United States)

Although the frequency dependent conductivity of ion-containing glasses often displays scale invariant power law dispersion at high temperatures, the exponent increases to unity at lower temperatures. We report measurements of the conductivity of a series of alkali metaphosphate glasses including a mixed alkali composition and demonstrate that this temperature dependence results from the superposition of two power law dispersions originating from {ital separate} {ital mechanism}, and does not indicate any intrinsic change in scaling of the process which dominates at high temperatures.

• Research Organization: Sandia National Laboratory
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 69587
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 74; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALKALI METAL COMPOUNDS
ALTERNATING CURRENT
FREQUENCY DEPENDENCE
IONIC CONDUCTIVITY
PHOSPHATE GLASS
SCALING LAWS
TEMPERATURE DEPENDENCE