Berlin 2015 – wissenschaftliches Programm
TT 71.33: Poster
Mittwoch, 18. März 2015, 15:00–18:00, Poster B
Spin dynamics in the kagome compound YBaCo3AlO7 — •M. Iakovleva1,2, E. Vavilova1,2, H.-J. Grafe1, M. Valldor3, V. Kataev1, and B. Büchner1 — 1IFW Dresden, 01069 Dresden, Germany — 2Zavoisky Physical-Technical Institute, 420029 Kazan, Russia — 3MPI CPfS, 01069 Dresden, Germany
YBaCo3AlO7 is a transition metal oxide compound with a magnetic kagome substructure where unconventional ground states such as a spin liquid can be expected. We have investigated the ground state and low energy spin dynamics of this material by 27Al nuclear magnetic resonance spectroscopy.
The characteristic features of the spectral shape and of the relaxation rate temperature dependences show that short-range quasi static correlations occur in the system but not a long-range antiferromagnetic order. We compare our NMR results with AC and DC susceptibility measurements and discuss a possible realization of a spin glass state due to intrinsic structural disorder in this material.