Current sharing between the metallic and superconducting layers of high temperature superconductor coated conductors operated above their critical current

2011 ◽  
Vol 109 (3) ◽  
pp. 033915 ◽  
Author(s):  
Pierre Bernstein ◽  
Conor McLoughlin ◽  
Yohann Thimont ◽  
Frédéric Sirois ◽  
Jonathan Coulombe
Keyword(s):  
High Temperature ◽  
Critical Current ◽  
High Temperature Superconductor ◽  
Coated Conductors ◽  
Current Sharing

Progress in high temperature superconductor coated conductors and their applications

2008 ◽  
Vol 21 (3) ◽  
pp. 034005 ◽  
Author(s):  
A P Malozemoff ◽  
S Fleshler ◽  
M Rupich ◽  
C Thieme ◽  
X Li ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor ◽  
Coated Conductors

Electron irradiation effects in doped high temperature superconductors YBa2Cu3−x MxOy (M = Fe, Ni; x=0; x=0:01)

Open Physics ◽  
2008 ◽  
Vol 6 (4) ◽  
Author(s):  
Aram Sahakyan ◽  
Sergei Nikoghosyan ◽  
Hrant Yeritsyan
Keyword(s):  
High Temperature ◽  
Critical Current ◽  
Irradiation Dose ◽  
High Temperature Superconductor ◽  
Defect Formation ◽  
Weak Link ◽  
High Temperature Superconductors ◽  
Large Change ◽  
Impurity Doped ◽  
Intergranular Critical Current Density

AbstractThe influence of irradiation by electrons with an energy of 8 MeV, at dose intervals between 1013 and 2×1018el/cm2, on the properties of impurity doped, high-temperature superconductor YBa2Cu3−x MxOy (M = Fe, Ni; x=0; x=0:01) ceramics has been studied.It has been established that, as the irradiation dose is increased, the onset temperature of the transition to the superconducting state (T con), and the intergranular weak link coupling temperature between granules (T mJ), exhibit an oscillation around their initial values of approximately about 1–1.5 K. This oscillation indicates that the process of radiation defect formation in HTSC occurs in multiple stages. It was also found that the critical current (J c)decreases with an increase of the irradiation dose, and exhibits a local minimum at a dose of 8×1016el/cm2coinciding with minima for T con and T mJ at this dose. It was found that the introduction of Fe atoms to the ceramic decreases T mJ, while introducing Ni atoms decreases both T con and T mJ; it is suggested that this is a result of Ni substitution of Cu both in Cu2 plane sites and Cu1 chain sites. The introduction of Ni causes a large change in the intergranular critical current density, J c. A critical irradiation dose is obtained (2×1018)after which all HTSC parameters strongly decrease, i. e. the superconductivity of HTSC is destroyed.

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