J(C) CHARACTERISTICS OF BIPBSRCACUO SILVER CLAMPED THICK-FILM

Transport critical current densities J(c) have been measured as functi ons of temperature and magnetic field for textured Bi1.8Pb0.4Sr2Ca2Cu3 Oy silver clamped thick films prepared by a physical deposition method . At 77 K, J(c) displays a very sensitive field dependence, with an or der of magnitude decrease of J(c) from 0 to 1 T. Large J(c) anisotropy was observed for magnetic fields parallel and perpendicular to the fi lm plane. As the temperature decreases, J(c) increases rapidly and the magnetic field dependence of J(c) is significantly weakened. A J(c) v alue larger than 10(4) A cm-2 at 52 K and 7 T was obtained, suggesting the possibility of application of Bi-based material using a coolant s uch as liquid nitrogen.