RT Journal Article
T1 Electrical conductivity relaxation and nuclear magnetic resonance of Li conducting Li_(0.5)La_(0.5)TiO_(3)
A1 León Yebra, Carlos
A1 Lucía Mulas, María Luisa
A1 Santamaría Sánchez-Barriga, Jacobo
A1 París, M. A.
A1 Sanz, J.
A1 Várez, A.
AB 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.
PB American Physical Society
SN 1098-0121
YR 1996
FD 1996-07-01
LK https://hdl.handle.net/20.500.14352/59660
UL https://hdl.handle.net/20.500.14352/59660
LA eng
NO © 1996 The American Physical Society.
DS Docta Complutense
RD 30 jun 2025