Electrical conductivity relaxation and nuclear magnetic resonance of Li conducting Li_(0.5)La_(0.5)TiO_(3)



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León Yebra, Carlos and Lucía Mulas, María Luisa and Santamaría Sánchez-Barriga, Jacobo and París, M. A. and Sanz, J. and Várez, A. (1996) Electrical conductivity relaxation and nuclear magnetic resonance of Li conducting Li_(0.5)La_(0.5)TiO_(3). Physical review B, 54 (1). pp. 184-189. ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.54.184


Lithium ionic conductivity of Li_(0.5)La_(0.5)TiO_(3) has been studied using nuclear magnetic resonance (NMR) and admittance spectroscopy (AS) techniques. Spin-lattice relaxation and electrical conductivity relaxation are well described in terms of stretched-exponential correlation functions in the time domain of the form φ(t) = exp(-(t/τ) (β), but showing different relaxation times scales (τ_(0) = 1.4 x 10^(-11) s from NMR and τ_(0) = 10^(-14) s from AS), and activation energies (0.15 and 0.4 eV, respectively). Different β exponents, 1 from spin lattice relaxation and 0.4 from electric-field relaxation have been also deduced. A microscopic activation energy for lithium motion of 0.15 eV is deduced from both techniques. Discrepancies between both techniques are analyzed and discussed in terms of frequency-dependent correlation effects.

Item Type:Article
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© 1996 The American Physical Society.

Uncontrolled Keywords:Ionic-conductivity; Glasses; Behavior.
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
ID Code:31276
Deposited On:21 Jul 2015 08:40
Last Modified:10 Dec 2018 14:58

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