Browsing by Author "Chow, KH"

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    8Li+ β-NMR in the cubic insulator MgO
    (IOP Publishing, 2014-12-16) MacFarlane, WA; Parolin, TJ; Cortie, DL; Chow, KH; Hossain, MD; Kiefl, RF; Levy, CDP; McFadden, RML; Morris, GD; Pearson, MR; Saadaoui, H; Salman, Z; Song, Q; Wang, D
    We present extensive high magnetic field β-NMR measurements of 8Li+ implanted in single crystals of MgO. The narrow resonance, consistent with a cubic 8Li+ site, likely the tetrahedral interstitital, is used routinely as a reference for shift measurements. We show the intrinsic linewidth is on the order of 200 Hz, allowing a frequency determination to an accuracy of a few Hz. We find no implantation energy dependence of the resonance within a few ppm, but there is evidence of slow spin dynamics in hole-burning measurements. The spin lattice relaxation is slow. The temperature dependence reveals interesting changes at low temperature whose origin remains uncertain. Open Access CC-BY