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arXiv 0906.2346cond-mat.mtrl-sci
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质子导电钙钛矿中质子动力学的中子自旋回波研究

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

Maths Karlsson, Dennis Engberg, Mårten E. Björketun, Aleksandar Matic, Göran Wahnström, Per G. Sundell, Pedro Berastegui, Istaq Ahmed, Peter Falus, Bela Farago,… 展开作者

Maths Karlsson, Dennis Engberg, Mårten E. Björketun, Aleksandar Matic, Göran Wahnström, Per G. Sundell, Pedro Berastegui, Istaq Ahmed, Peter Falus, Bela Farago, Lars Börjesson, Sten Eriksson

摘要:

我们证明了使用中子自旋回波光谱,一个强大的方法,迄今被忽视的陶瓷质子导体中的质子动力学的研究质子导电钙钛矿中的质子动力学研究的适用性。通过结合我们的中子自旋回波结果的水合BaZr0.90Y0.10O2.95从动力学建模的基础上第一性原理计算的结果,我们表明,已经在一个长度尺度短至2 nm的长距离质子自扩散观察到的,掺杂剂原子作为捕获中心的可能的效果已经平均。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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