β-NMR of 8Li+ in rutile TiO2
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Abstract
We report preliminary low-energy β-NMR measurements of 8Li+ implanted in single crystal rutile TiO2 at an applied field of 6.55 T and 300 K. We observe a broad 12 kHz wide quadrupole split resonance with unresolved features and a sharp component at the Larmor frequency. The line broadening may be caused by overlapping multi-quantum transitions or motion of 8Li+ on the scale of its lifetime (1.21 s). We also find spin-lattice relaxation that is relatively fast compared to other wide band gap insulators. The origin of this fast relaxation is also likely quadrupolar and may be due to anisotropic 8Li+ diffusion. © The Authors CC-BY 3.0
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McFadden, R. M. L., Cortie, D. L., Arseneau, D. J., Buck, T. J., Chen, C. C., Dehn, M. H., Dunsiger, S. R., Kiefl, R. F., Levy, C. D. P., Li, C., Morris, G. D., Pearson, M. R., Samuelis, D., Xiao, J., Maier, J., & MacFarlane, W. A. (2014). β-NMR of 8Li+ in rutile TiO2. Paper presented to the 13th International Conference on Muon Spin Rotation, Relaxation and Resonance 1–6 June 2014, Grindelwald, Switzerland. In Journal of Physics: Conference Series, 551(1), 012032. doi:10.1088/1742-6596/551/1/012032