Ga NMR study of the local susceptibility in SrCr8Ga4O19: pseudogap and paramagnetic defects

P. Mendels; A. Keren; L. Limot; M. Mekata; G. Collin; M. Horvatic

doi:10.1103/PhysRevLett.85.3496

Ga NMR study of the local susceptibility in SrCr8Ga4O19: pseudogap and paramagnetic defects

Strongly Correlated Electrons 2009-10-31 v1

Authors: P. Mendels , A. Keren , L. Limot , M. Mekata , G. Collin , M. Horvatic

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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

Ga NMR local susceptibility Kagome lattice geometric frustration pseudogap paramagnetic clusters antiferromagnet

Cite

@article{arxiv.cond-mat/0004077,
  title  = {Ga NMR study of the local susceptibility in SrCr8Ga4O19: pseudogap and paramagnetic defects},
  author = {P. Mendels and A. Keren and L. Limot and M. Mekata and G. Collin and M. Horvatic},
  journal= {arXiv preprint arXiv:cond-mat/0004077},
  year   = {2009}
}

Comments

4 pages, 5 figures Submitted to Phys. Rev. Lett

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