Ga NMR study of the local susceptibility in kagome-based SrCr8Ga4O19: Pseudogap and paramagnetic defects

Authors
Mendels, P Keren, A Limot, L Mekata, M Collin, G Horvatic, M
Citation
P. Mendels et al., Ga NMR study of the local susceptibility in kagome-based SrCr8Ga4O19: Pseudogap and paramagnetic defects, PHYS REV L, 85(16), 2000, pp. 3496-3499
Citations number
24
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
16
Year of publication
2000
Pages
3496 - 3499
Database
ISI
SICI code
0031-9007(20001016)85:16<3496:GNSOTL>2.0.ZU;2-0
Abstract
We present the first Ga(4f) NMR study of the Cr susceptibility in the arche type of kagome-based frustrated antiferromagnets, SrCr8Ga4O19. Our major fi nding is that the susceptibility of the frustrated lattice goes through a m aximum around 50 K. Our data also support the existence of paramagnetic "cl usters" of spins, responsible fur the Curie behavior observed in the macros copic susceptibility at low T. These results set novel features for the con stantly debated physics of geometrically frustrated magnets.