TY  - JOUR
AU  - Nozaki, Hiroshi
AU  - Harada, Masashi
AU  - Ohta, Shingo
AU  - Watanabe, Isao
AU  - Miyake, Yasuhiro
AU  - Ikedo, Yutaka
AU  - Jalarvo, Niina
AU  - Mamontov, Eugene
AU  - Sugiyama, Jun
TI  - Li diffusive behavior of garnet-type oxides studied by muon-spin relaxation and QENS
JO  - Solid state ionics
VL  - 262
SN  - 0167-2738
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2015-01766
SP  - 585 - 588
PY  - 2014
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000338810500128
DO  - DOI:10.1016/j.ssi.2013.10.014
UR  - https://juser.fz-juelich.de/record/188360
ER  -