Exploring the Dynamics of Glasses Using Beta Detected NMR

Authors

Victoria L. Karner, University of British Columbia
Tianyi Liu, University of Pennsylvania
Iain McKenzie, TRIUMF
Aris Chatzichristos, University of British Columbia
David L. Cortie, Australian National UniversityFollow
Gerald D. Morris, TRIUMF
Robert F. Kiefl, University of British Columbia
Ryan M. L McFadden, University of British Columbia
Zahra Fakhraai, University of Pennsylvania
Monika Stachura, TRIUMF
W A. MacFarlane, University of British Columbia

RIS ID

132141

Publication Details

Karner, V. L., Liu, T., McKenzie, I., Chatzichristos, A., Cortie, D. L., Morris, G. D., Kiefl, R. F., McFadden, R. M. L., Fakhraai, Z., Stachura, M. & MacFarlane, W. (2018). Exploring the Dynamics of Glasses Using Beta Detected NMR. Proceedings of the 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017) (pp. 011022-1-011022-5). Tokyo, Japan: The Physical Society of Japan.

Abstract

We report 8Li spin lattice relaxation in two forms of the molecular glass TPD, one a normal glass and one prepared in an ultrastable configuration. The relaxation is remarkably fast, similar to 8Li relaxation in other organic materials and shows a stretched exponential behavior typical of glasses with a small stretching exponent β = 0.3. At low temperature, there is little or no difference between the two glasses, while above 250 K, the relaxation in the denser ultrastable form is faster. In addition, in this temperature range, the data shows a significant thermal hysteresis.