Browsing by Author "Chen, CC"

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    β-NMR of 8Li+ in rutile TiO2
    (IOP Publishing, 2014-12-16) McFadden, RML; Cortie, DL; Arseneau, DJ; Buck, TJ; Chen, CC; Dehn, MH; Dunsiger, SR; Kiefl, RF; Levy, CDP; Li, C; Morris, GD; Pearson, MR; Samuelis, D; Xiao, J; Maier, J; MacFarlane, WA
    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