Journal Article

FZJ-2015-01766

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Li diffusive behavior of garnet-type oxides studied by muon-spin relaxation and QENS

Nozaki, H. (Corresponding Author) ; Harada, M. ; Ohta, S. ; Watanabe, I. ; Miyake, Y. ; Ikedo, Y. ; Jalarvo, N.FZJ* ; Mamontov, E. ; Sugiyama, J.

2014
Elsevier Science Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.ssi.2013.10.014

Abstract: A diffusive behavior of Li+ ion in a garnet-type oxide, Li5 + xLa3ZrxNb2 − x012 with x = 0–2, has been investigated by both a positive muon-spin relaxation (μ+SR) and quasi-elastic neutron scattering (QENS) technique using powder samples. The μ+SR results revealed that Li+ ions start to diffuse above ~ 150 K for the whole samples measured. The activation energy of Li diffusion (Ea) estimated from the μ+SR data was in good agreement with Ea obtained by the QENS measurements. However, both Eas were about a half of Ea of ionic conductivity of Li+ (σLi), which was evaluated by AC-impedance measurements on sintered pellets. This indicated the serious effect of grain boundary and/or surface on Ea. Furthermore, since the diffusion coefficient of Li+ estimated by μ+SR is roughly independent of x, the number of mobile Li+ in the garnet lattice was found to be the predominant parameter to determine σLi.

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Contributing Institute(s):

1. Neutronenstreuung (Neutronenstreuung ; JCNS-1)
2. JCNS-SNS (JCNS-SNS)

Research Program(s):

1. 54G - JCNS (POF2-54G24) (POF2-54G24)
2. 451 - Soft Matter Composites (POF2-451) (POF2-451)

Appears in the scientific report 2014

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Database coverage:
Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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