We have measured the electrical resistivity, thermoelectric power, magnetic susceptibility, Hall coefficient and upper critical field near Tc in EuBa2Cu3Ox, where 6.09<x<7.0. These data suggest a Mott-Hubbard-like transition near a critical oxygen concentration xc∼6.4-6.5. Our results, combined with those reported elsewhere, show a striking similarity between the addition of oxygen to EuBa2Cu3O6 and the substitution of divalent atoms M for La in La2-yMyCuO4. We suggest that superconductivity in both systems is associated with the Cu-O planes and is driven electronically.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering