# 8Li in GaAs studied with $\beta$-NMR

 Title 8Li in GaAs studied with $\beta$-NMR Publication Type Journal Article Year of Publication 2007 Authors Dunlop, T, Mansour, AI, Salman, Z, Chow, KH, Fan, I, Jung, J, Kiefl, RF, Kreitzman, SR, Levy, CDP, MacFarlane, WA, Morris, GD, Parolin, TJ Journal Physica B Volume 401–402 Pagination 254 - 257 ISSN 0921-4526 Abstract β -NMR has been used to study isolated spin polarized Li + 8 in bulk crystalline GaAs. At low temperatures a large fraction (at least 70%) of the Li end up in locations with cubic symmetry (e.g. a tetrahedral interstitial site). The linewidth of the β -NMR Li + 8 resonance increases dramatically above 150 K, and reaches a maximum at about 290 K. These results are consistent with a site change from an interstitial to a substitutional beginning at ≈ 150 K . The field dependence of the linewidth at 100 K is also discussed. URL http://www.sciencedirect.com/science/article/pii/S0921452607007077 DOI 10.1016/j.physb.2007.08.160