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Origin of constant loss in ionic conductors

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León Yebra, Carlos and Rivera Calzada, Alberto Carlos and Várez, A. and Sanz, J. and Santamaría Sánchez-Barriga, Jacobo (2001) Origin of constant loss in ionic conductors. Physical review letters, 86 (7). pp. 1279-1282. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.86.1279


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http://journals.aps.org/Publisher


Abstract

We have analyzed the constant loss contribution to the ac conductivity in the frequency range 10 Hz–1 MHz and temperatures down to 8 K, for two Li ionic conductors, one crystalline (Li_(0.18)La_(0.61)TiO_(3)) and the other glassy (61SiO_(2) . 35Li_(2)O . 3Al_(2)O_(3) . P_(2)O_85)). As temperature is increased a crossover is observed from a nearly constant loss to a fractional power law frequency dependence of the ac conductivity. At any fixed frequency ω, this crossover occurs at a temperature T such that ω = v_(0) exp(-E_(m)/k_(B)T), where v_(0) is the attempt frequency and E_(m) is identified with the barrier for Li^(+) ions to leave their wells.


Item Type:Article
Additional Information:

© 2001 The American Physical Society. The authors thank H. Jain for providing experimental data of the lithium silicate glass. Financial support from CICYT Grant No. MAT98-1053-C04 is also acknowledged. K. L. N. is supported by ONR.

Uncontrolled Keywords:Non-Arrhenius conductivity; AC conductivity; Nonlinear lattices; Slow relaxation; Oxide glasses; Temperature; Dynamics; Spectra; Melts; Spectroscopy.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:31133
Deposited On:29 Jun 2015 11:01
Last Modified:10 Dec 2018 14:58

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