Mechanical Property and its Influence on Critical Current of Superconducting Composite Wires.

the influence of social and cultural capital on efl students critical thinking skills

the major aim of this study was to investigate the relationship between social and cultural capital and efl students’ critical thinking skills. this study takes this relationship in to account to see if people with different sociocultural status are different regarding their critical thinking skills. to this end, 160 university students majoring in english language and literature, english trans...

Transport and magnetic critical current in superconducting MgB2 wires

Direct comparison of the magnetic and transport critical current density (Jc) for the same pieces of copper-sheathed MgB2 wires shows a large discrepancy in magnitude and field dependence of the two. The value of magnetic Jc can differ from the value of transport Jc by a factor of 10 or more. This discrepancy does not occur merely because of the difference in the voltage at which the magnetic a...

Effects of cold-treatment and strain-rate on mechanical properties of NbTi/Cu superconducting composite wires

During design and winding of superconducting magnets at room temperature, a pre-tension under different rate is always applied to improve the mechanical stability of the magnets. However, an inconsistency rises for superconductors usually being sensitive to strain and oversized pre-stress which results in degradation of the superconducting composites' critical performance at low temperature. Th...

Critical-current reduction in thin superconducting wires due to current crowding

Superconducting current in narrow proximity wires

The critical supercurrent in proximty-wires shows a surprising temperature dependence in the experiment [1]. This observation has lead to speculation whether there are new e ects involved and/or the usual criterion for the dirty limit is not valid for this type of systems. We propose a simple SNS-model for this system and show analytically, that this unexpected scaling is already contained in a...