Beta Detected NMR of LaAlO3

Authors

Victoria L. Karner, University of British Columbia
Ryan M. L McFadden, University of British Columbia
Aris Chatzichristos, University of British Columbia
Gerald D. Morris, TRIUMF
Matthew R. Pearson, TRIUMF
C D. P Levy, TRIUMF
Zaher Salman, Paul Scherrer Institute
David L. Cortie, Australian National UniversityFollow
Robert F. Kiefl, University of British Columbia
W A. MacFarlane, University of British Columbia

RIS ID

132143

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.

Abstract

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.