Ga NMR study of the local susceptibility in SrCr8Ga4O19: pseudogap and paramagnetic defects
Preprint
- 5 April 2000
Abstract
We present the first Ga(4f) NMR study of the Cr susceptibility in the archetype of Kagome based frustrated antiferromagnets, SrCr$_{8}$Ga$_{4}$O$_{19}$. Our major finding is that the susceptibility of the frustrated lattice goes through a maximum around 50 K. Our data also supports the existence of paramagnetic ``clusters'' of spins, responsible for the Curie behavior observed in the macroscopic susceptibility at low T. These results set novel features for the constantly debated physics of geometrically frustrated magnets.Keywords
All Related Versions
- Version 1, 2000-04-05, ArXiv
- Published version: Physical Review Letters, 85 (16), 3496.
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