R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
We report electron paramagnetic resonance experiments in single crystals of the high Tc superconductor YBa2Cu3O7-x. No EPR signal is observed in the spectra of the properly annealed crystals with Tc≅90K. However, we observe a strong, almost isotropic Cu2+ signal in the spectra of the as-grown (unannealed) single crystals with Tc≅40K. The observed signal has a slightly anisotropic g-factor which becomes totally isotropic at T≅90K. The linewidth, dominated by the hyperfine interaction, remains anisotropic at all temperatures, showing that the signal originates from a site which does not have real cubic symmetry. © 1988.
R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
G. Will, N. Masciocchi, et al.
Zeitschrift fur Kristallographie - New Crystal Structures
Min Yang, Jeremy Schaub, et al.
Technical Digest-International Electron Devices Meeting
William G. Van der Sluys, Alfred P. Sattelberger, et al.
Polyhedron