Title :
Superconductivity, critical current density, and magnetic properties of Fe-substituted Y1Ba2(Cu1-xFex)3O z materials
Author :
Sekula, S.T. ; Brynestad, J. ; Christen, D.K. ; Thompson, J.R. ; Kim, Y.C.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
The superconductive properties of a series of Fe-substituted Y1Ba2(Cu1-xFex)3O z materials, with x=0 to 10 at.%Fe, have been studied. It was found that the Tc decreased linearly with Fe content x at the rate of 6.7 K/at.%. The intragranular critical-current density Jc decreased exponentially both with reduced temperature, T/Tc, and Fe concentration. Since the addition of Fe strongly drives the structure toward tetragonality, it is concluded that neither copper-oxygen chains nor macroscopic twinning is essential for high-temperature superconductivity
Keywords :
barium compounds; critical current density (superconductivity); high-temperature superconductors; magnetisation; yttrium compounds; Y1Ba2(Cu1-xFex)3 Oz; critical-current density; high temperature superconductors; magnetisation; Annealing; Critical current density; High temperature superconductors; Inorganic materials; Iron; Magnetic materials; Magnetic properties; Powders; Superconducting materials; Superconductivity;
Journal_Title :
Magnetics, IEEE Transactions on
