Title :
Magnetic field dependence of critical current density in Sm1+xBa2-xCu3O6+δ films prepared by pulsed laser deposition
Author :
Sudoh, K. ; Ichino, Y. ; Yoshida, Y. ; Takai, Y. ; Hirabayashi, I.
Author_Institution :
Dept. of Energy Eng. & Sci., Nagoya Univ., Japan
fDate :
6/1/2003 12:00:00 AM
Abstract :
We have investigated Sm1+xBa2-xCu3O6+δ (SmBCO) films deposited by pulsed laser deposition technique using stoichiometric and Sm-rich SmBCO (x = 0.08) laser targets. In the SmBCO films deposited using the target of x = 0.08, the critical current density (Jc) at 77 K with zero applied field was obtained 4.3 MA/cm2 at film thickness of 1.1 μm. To study the pinning mechanism of SmBCO films, we investigated the magnetic field (0 ∼ 9 T) dependence of Jc for x = 0 and x = 0.08 films. From this result, we found the different behavior of the Jc between x = 0 and x = 0.08 films. We examined the difference of pinning mechanism from the scaling law and the microstructure of film using transmission electron microscopy.
Keywords :
barium compounds; critical current density (superconductivity); crystal microstructure; flux pinning; high-temperature superconductors; pulsed laser deposition; samarium compounds; superconducting thin films; 0 to 9 T; 1.1 micron; 77 K; Sm1+xBa2-xCu3O6+δ; Sm1+xBa2-xCu3O6+δ films; critical current density; high temperature superconductor; magnetic field dependence; microstructure; pinning mechanism; pulsed laser deposition; scaling law; transmission electron microscopy; Critical current density; Magnetic fields; Magnetic films; Optical pulses; Power engineering and energy; Pulsed laser deposition; Samarium; Superconducting films; Superconductivity; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.812016
