Publication Details

Karner, V. L., McFadden, R. M. L., Chatzichristos, A., Morris, G. D., Pearson, M. R., Levy, C., Salman, Z., Cortie, D. L., Kiefl, R. F. & MacFarlane, W. (2018). Beta Detected NMR of LaAlO3. Proceedings of the 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017) (pp. 011023-1-011023-6). Tokyo, Japan: The Physical Society of Japan.


Using 8Li β-NMR we studied the temperature dependence of the spin-lattice relaxation in LaAlO3 in high magnetic field. The relaxation in LAO is composed of two components: a fast-relaxing signal with a small amplitude, and a large amplitude, slow relaxing component. The data was fit using a highly-constrained model which assumes that the temperature dependence of the slow and fast component is the same at all temperatures. The 8Li relaxation suggests a T2 temperature dependence, indicating that the relaxation mechanism could be due to a coupling between the quadrupole moment of 8Li and the soft-mode, low energy phonons in LAO.



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