Quasielastic neutron scattering of hydrated BaZr_{0.90}A_{0.10}O_{2.95} (A = Y and Sc)

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dc.creatorKarlsson, M.
dc.creatorMatic, A.
dc.creatorEngberg, D.
dc.creatorBjörketun, M. E.
dc.creatorKoza, M. M.
dc.creatorAhmed, I.
dc.creatorWahnström, G.
dc.creatorBerastegui, P.
dc.creatorBörjesson, L.
dc.creatorEriksson, S.
dc.date2008-02-07
dc.date.accessioned2026-07-07T09:19:14Z
dc.date.available2026-07-07T09:19:14Z
dc.descriptionProton motions in hydrated proton conducting perovskites BaZr_{0.90}A_{0.10}O_{2.95} (A = Y and Sc) have been investigated using quasielastic neutron scattering. The results reveal a localized motion on the ps time scale and with an activation energy of ~10-30 meV, in both materials. The temperature dependence of the total mean square displacement of the protons suggests an onset of this motion at a temperature of about 300 K. Comparison of the QENS results to density functional theory calculations suggests that for both materials this motion can be ascribed to intra-octahedral proton transfers occurring close to a dopant atom. The low activation energy, more than ten times lower than the activation energy for the macroscopic proton conductivity, suggests that this motion is not the rate-limiting process for the long-range proton diffusion, i.e. it is not linked to the two materials significantly different proton conductivities.
dc.description8 pages, 7 figures, 2 tables
dc.identifierhttps://arxiv.org/abs/0802.0924
dc.identifierhttp://arxiv.org/abs/0802.0924
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/154316
dc.subjectMaterials Science
dc.titleQuasielastic neutron scattering of hydrated BaZr_{0.90}A_{0.10}O_{2.95} (A = Y and Sc)
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