Charge Segregation, Cluster Spin Glass, and Superconductivity in La{sub 1.94}Sr{sub 0.06}CuO{sub 4}
- Dipartimento di Fisica A. Volta, Unita INFM di Pavia, Via Bassi 6, I-27100 Pavia (Italy)
- Department of Physics, Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)
- Grenoble High Magnetic Field Laboratory, CNRS and MPI-FKF, BP 166, F-38042 Grenoble Cedex 9 (France)
- Laboratoire de Spectrometrie Physique, Universite J. Fourier, BP 87, F-38402 St. Martin d`Heres (France)
- Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-70569, Stuttgart (Germany)
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-cluster nature of the spin glass. We discuss how this phase can be related to the microsegregation of mobile holes and to the possible pinning of charge stripes. {copyright} {ital 1999} {ital The American Physical Society }
- Research Organization:
- Ames National Laboratory
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 355470
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
Similar Records
Glassy spin freezing and NMR wipeout effect in the high-T{sub c} superconductor La{sub 1.90}Sr{sub 0.10}CuO{sub 4}: Critical discussion of the role of stripes
Low frequency spin dynamics in undoped and Sr-doped La[sub 2]CuO[sub 4]