Abstract
The diffusion coefficient of ions () in the battery material has been investigated by muon-spin relaxation (). Based on experiments in zero and weak longitudinal fields at temperatures up to 400 K, we determined the fluctuation rate () of the fields on the muons due to their interaction with the nuclear moments. Combined with susceptibility data and electrostatic potential calculations, clear ion diffusion was detected above . The estimated from was in very good agreement with predictions from first-principles calculations, and we present the technique as an optimal probe to detect for materials containing magnetic ions.
- Received 16 June 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.147601
©2009 American Physical Society