Critical currents and differential resistance of YBA2CU3O7-X superconducting ceramics (CROSBI ID 213257)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Babić, Emil ; Prester, Mladen ; Marohnić, Željko ; Car, Tihomir ; Biškup, Neven ; Siddiqui, S. A.
engleski
Critical currents and differential resistance of YBA2CU3O7-X superconducting ceramics
Transport critical current density (Jc) and differential resistance of several YBaCuO samples have been measured in the temperature range 77–91K and in the weak magnetic fields (H⩽ 150 Oe). At all fields and temperatures Rf exhibits a S-shape variation with current. For the well-prepared low- resitivity samples Rf reaches in the linear V-I regime a value of 0.15Rn, Rn being the normal resistance just above the transition, consistent with picture of the decoupled superconducting grains. Because of self-field effects, J obtained from transport (and magnetization) measurements does not provide useful information on the nature of intergrain coupling. The distributions of critical currents (d2V/dl2 vs. I) seem to rule out larger enhancement of Jc in sintered samples.
superconducting ceramics ; critical currents
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Podaci o izdanju
72 (8)
1989.
753-757
objavljeno
0038-1098
1879-2766
10.1016/0038-1098(89)90902-2