Using neutron spin-echo to investigate proton dynamics in proton-conducting perovskites

Details Using neutron spin-echo to investigate proton dynamics in proton-conducting perovskites Using neutron spin-echo to investigate proton dynamics in proton-conducting perovskites

2009-06-12

arxiv.org/abs/0906.2346v1

Physics

Condensed Matter

Materials Science

3 pages, 3 figures, Supporting Information available

Scientific paper

We demonstrate the applicability of studying the proton dynamics in proton-conducting perovskites using neutron spin-echo spectroscopy, a powerful method hitherto neglected for studies of the proton dynamics in ceramic proton conductors. By combining our neutron spin-echo results of hydrated BaZr0.90Y0.10O2.95 with results obtained from kinetic modeling based on first-principles calculations we show that already over a length-scale as short as 2 nm the long-range proton self-diffusion is observed, and the likely effect of dopant atoms acting as trapping centers has averaged out.

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