Determination of the nature of fluctuations using ${}^{8}Li$ and ${}^{9}Li$ $\beta$-NMR and spin-lattice relaxation

Abstract

We report a comparison of the $1/T_1$ spin lattice relaxation rates (SLR) for ${}^{9}Li$ and ${}^{8}Li$ in Pt and SrTiO${}_3$, in order to differentiate between magnetic and electric quadrupolar relaxation mechanisms. In Pt, the ratio of the $1/T_1$ spin relaxation rates $R_{Pt}$ was found to be 6.82(29), which is close to but less than the theoretical limit of $\sim 7.68$ for pure magnetic relaxation. In SrTiO${}_3$ this ratio was found to be 2.7(3), which is close but larger than the theoretical limit of $\sim 2.14$ expected for pure electric quadrupolar relaxation. These results bring new insight into the nature of the fluctuations in the local environment of implanted ${}^{8}Li$ observed by $\beta$-NMR.

8 pages, 6 figures, submitted for publication at Physical Review B

References in corpus (3)

• Nature of weak magnetism in SrTiO3/LaAlO3 multilayers
• $\beta$-NMR of Isolated ${}^8$Li${}^{+}$ Implanted into a Thin Copper Film
• Beta-NMR of Isolated Lithium in Nearly Ferromagnetic Palladium

Cited by in corpus (2)

• Microscopic Dynamics of Li${}^{+}$ in Rutile TiO${}_2$ Revealed by ${}^8$Li $\beta$-detected NMR
• Ion-Implanted ${}^8$Li Nuclear Magnetic Resonance in Highly Oriented Pyrolytic Graphite