Charge Segregation, Cluster Spin-Glass and Superconductivity in La1.94Sr0.06CuO4

@article{Julien1999ChargeSC,
  title={Charge Segregation, Cluster Spin-Glass and Superconductivity in La1.94Sr0.06CuO4},
  author={Marc-Henri Julien and Ferdinando Borsa and Pietro Carretta and M. Horvati{\'c} and Claude Berthier and C. Lin},
  journal={Physical Review Letters},
  year={1999},
  volume={83},
  pages={604-607}
}
A {sup 63}Cu and {sup 139}La NMR/NQR study of superconducting (T{sub c}=8 K) La{sub 1.94} Sr{sub 0.06} CuO{sub 4} single crystal is reported. Coexistence of spin-glass and superconducting phases is found below {approximately}5 K from {sup 139}La NMR relaxation. {sup 63}Cu and {sup 139}La NMR spectra show that, upon cooling, CuO{sub 2} planes progressively separate into two magnetic phases, one of them having enhanced antiferromagnetic correlations. These results establish the antiferromagnetic… 
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