Ion Jump Motion as the Background for Muon Diffusion in Battery Materials Research Using $μ$SR
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arXiv
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866910027595382784 |
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| author | Kadono, Ryosuke |
| author_facet | Kadono, Ryosuke |
| contents | Numerical simulations of muon spin relaxation ($μ$SR) in ion diffusion were performed using the {\sl extended} Kubo-Toyabe (KT) relaxation function $G_z^{\rm EA}(t)$ that incorporates an Edwards-Anderson type autocorrelation function for the jump motion of ions. The analysis of the generated $μ$SR spectra using the conventional KT function $G_z^{\rm KT}(t;Δ_{\rm KT},ν_{\rm KT})$ (mimicking the previous analysis procedure) suggest that the anomalous peak in the fluctuation rate $ν_{\rm KT}$ around a specific temperature $T^*$ and associated decrease of the linewidth $Δ_{\rm KT}$ above $T^*$, often observed in the previous $μ$SR studies on ion diffusion, originate from the sharp increase in the ion jump rate $ν_{\rm i}$ against that of the muon $ν_μ$ with increasing temperature. This indicates that a more detailed reanalysis of the vintage data using $G_z^{\rm EA}(t)$ is useful for the proper evaluation of $ν_{\rm i}$ and $ν_μ$. Meanwhile, it also suggests that the $μ$SR results showing no such anomaly convey little information on ion diffusion. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_21013 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ion Jump Motion as the Background for Muon Diffusion in Battery Materials Research Using $μ$SR Kadono, Ryosuke Materials Science Numerical simulations of muon spin relaxation ($μ$SR) in ion diffusion were performed using the {\sl extended} Kubo-Toyabe (KT) relaxation function $G_z^{\rm EA}(t)$ that incorporates an Edwards-Anderson type autocorrelation function for the jump motion of ions. The analysis of the generated $μ$SR spectra using the conventional KT function $G_z^{\rm KT}(t;Δ_{\rm KT},ν_{\rm KT})$ (mimicking the previous analysis procedure) suggest that the anomalous peak in the fluctuation rate $ν_{\rm KT}$ around a specific temperature $T^*$ and associated decrease of the linewidth $Δ_{\rm KT}$ above $T^*$, often observed in the previous $μ$SR studies on ion diffusion, originate from the sharp increase in the ion jump rate $ν_{\rm i}$ against that of the muon $ν_μ$ with increasing temperature. This indicates that a more detailed reanalysis of the vintage data using $G_z^{\rm EA}(t)$ is useful for the proper evaluation of $ν_{\rm i}$ and $ν_μ$. Meanwhile, it also suggests that the $μ$SR results showing no such anomaly convey little information on ion diffusion. |
| title | Ion Jump Motion as the Background for Muon Diffusion in Battery Materials Research Using $μ$SR |
| topic | Materials Science |
| url | https://arxiv.org/abs/2511.21013 |