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Título:
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Electrical conductivity relaxation and nuclear magnetic resonance of Li conducting Li_(0.5)La_(0.5)TiO_(3)
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Autores:
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León Yebra, Carlos ;
Lucía Mulas, María Luisa ;
Santamaría Sánchez-Barriga, Jacobo ;
París, M. A. ;
Sanz, J. ;
Várez, A.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 1996-07-01
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Electricidad
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Materia = Ciencias: Física: Electrónica
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Tipo = Artículo
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Resumen:
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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 ?(t) = exp(-(t/?) (?), but showing different relaxation times scales (?_(0) = 1.4 x 10^(-11) s from NMR and ?_(0) = 10^(-14) s from AS), and activation energies (0.15 and 0.4 eV, respectively). Different ? 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.
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En línea:
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https://eprints.ucm.es/id/eprint/31276/1/LeonC128libre.pdf
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