Critical current temperature dependence

Bending of Flat NbsSn Layer (Fig. 3). Here also, the reduction of critical currents was dependent on temperature and orientation of the sample in the field. The third parameter, the elongation (2.5 and 5 mm), did not contribute appreciably to a change in critical current since the corresponding compression is less significant in comparison. 

Critical care analytes, measuring, 24 55 Critical cooling rate, of steel, 23 283 Critical current density, 23 821-823, 825 optimization of, 23 829 in PIT conductors, 23 833-834 temperature and field dependence of, 23 847-848... 

Aponte, J., Abache, H., Sa-Neto, A. and Octavio, M., Temperature Dependence of the Critical Current in High-Tc Superconductors, Phys. Rev. B39 2233 (1989). 

The heat and entropy associated with the above reaction implied by the temperature dependence of the critical oxygen activity were —46 kcal mol 02 1 (-192 kJ mol 02 ) and -45 kcal K-1 mol O 1 (-188 kJ K-1 mol 02- ) in close agreement with the results of Berry.81 Oxygen adsorption and oxide formation on platinum have also been studied using exchange currents in a solid electrolyte cell.82... 

It would be interesting to carry out experiments on S/F structures with non-collinear magnetization in order to observe this new type of superconductivity. As follows from a semiquantitative analysis, the best conditions to observe the Josephson critical current caused by the TC are high interface transparency (small y ) and low temperatures. These conditions are a bit beyond our quantitative study. Nevertheless, all qualitative features predicted here (angle dependence, etc) should remain in a general case when one has to deal with the non-linear Usadel equation. 

The strong inverse dependence of critical current density on magnetic field at 77 K is a limitation associated with Bi-2223 tape. This necessitates operation at lower temperatures for certain applications (e.g. electromagnets) when the cable is subjected to strong magnetic fields. This limitation does not arise with the (RE)BCO system and intensive efforts are being made to manufacture suitable tapes. 

Figure 7 Temperature dependence of the relative values of the critical current density Jq T), critical field BdT), energy gap Eg, density of superconducting electrons ng, and penetration depth X (T) in the Type II superconducting state below the transition temperature Tc...

Current-Voltage, I(V), characteristics were also measured on the same unstructured film in the presence of a magnetic field applied perpendicularly to the sample surface for two different temperatures. The critical current is defined by the arbitrary electric field criterion E = Ecr= 10 V/cm. Fig. 2 shows the resulting magnetic field dependence of the critical current, I. The film shows the usually reported monotonic field dependence of Ic. The expected enhancements of the critical current for fields values close to the first matching field, H] a 1 Tesla, for T = 3.1 K was not detected. This result could be ascribed to the... 

Figure 9 Dependence of the critical current on the external magnetic field from 21 K to 33 K, for the sample of Fig. 8. A clear phase shift of ix is observed at the same threshold temperature for which a minimum of the Josephson current is achieved.

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