Properties of Normal and Superconducting States of Differently Doped REBa_{2}Cu_{3}O_{7-x}

• Authors: C. Sułkowski
• Languages of publication: EN

Abstracts

EN

Temperature dependence of resitivity, ρ(T), thermopower, S_{300}, superconducting transition temperature, T_{c}, and lower critical field, Η_{c1}(0), of differently doped REBa_{2}Cu_{3}O_{7-x} ceramics have been measured. The hole doping of the CuO_{2} plane is determined by the T_{c}, the oxygen concentration and/or the value of the thermopower. The temperature dependence of the resistivity above 200 K and the values of the lower critical field H_{c1}(0) show clear dependence on the hole concentration. Below 200 K, in contrast to simple metals, the resitivity of all samples decreases faster than linearly with the decreasing temperature. Classical electron-phonon scattering mechanism is not appropriate to describe the ρ(T) curves of REBa_{2}Cu_{3}O_{7-x} compounds. Some observed features of the ρ(T) dependence are predicted by mean field phase diagram for the CuO_{2} plane.

Keywords

EN

74.72.-h; 74.25.Fy

• Journal: Acta Physica Polonica A
• Year: 1995
• Volume: 88
• Issue: 2
• Pages: 375-380

Dates

published

1995-08

received

1995-01-05

(unknown)

1995-05-25

Contributors

author

C. Sułkowski

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, 50-950 Wrocław, Poland