Bulk YBa2Cu3O7-x (YBCO) wires and tubes were fabricated by an extrusion technique. Critical current density (Jc) was measured as a function of applied magnetic field at 77 K and was found to decrease significantly in fields below 100 G. Jc was dependent on specimen geometry. In addition, when a concentric magnetic field was generated by passing a current though a copper wire, the external field from the wire could interfere constructively or destructively with the magnetic field produced by current in a YBCO tube. The change in electrical properties with magnetic field has been attributed to weak-link behavior at the grain boundaries. Batch-to-batch differences in the field dependence of Jc imply the possibility of reducing the dependence by processing modifications.
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R. L. Peterson and J. W. Ekin, Phys. Rev. B 37, 9848 (1988).
D. Goldschmidt, Phys. Rev. B 39, 2372 (1989).
S. E. Babcock and D. C. Larbalestier, Appl. Phys. Lett. 55, 393 (1989).
T. M. Shaw, S. L. Shinde, D. Dimos, R. F. Cook, P. R. Duncombe, and C. Kroll, J. Mater. Res., 4 248 (1989).
K. C. Goretta, M. T. Lanagan, J. P. Singh, J. T. Dusek, U. Balachandran, S. E. Dorris, and R. B. Poeppel, Mater. & Manufact. Process., 4, 163 (1989).
M. E. McHenry, M. P. Maley, and J. 0. Willis, Phys. Rev. B. 40, 2666, (1989).
R. B. Stephens, Cryogenics 29, 399 (1989).
M. T. Lanagan, U. Balachandran, M. T. Cao, S. E. Dorris, J. T. Dusek, K. C. Goretta, R. B. Poeppel, J. P. Singh, and C. A. Youngdahl, Proc. Workshop on High-Tc Superconductivity, May 23-25, 1989, Huntsville, AL.
J. R. Delayen and C. L. Bohn, Phys. Rev. B 40, 5151 (1989).
T. Pienkowski, J. Kincaid, M. T. Lanagan, R. B. Poeppel, J. T. Dusek, D. Shi, and K. C. Goretta, Proc. Wire and Cable Symp., 24, Nov. 15-17, 1988, Reno, NV.
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Lanagan, M.T., Balachandran, U., Youngdahl, C.A. et al. Effect of Magnetic Field on Critical Current Density in Bulk Superconducting Wires. MRS Online Proceedings Library 169, 1231–1234 (1989). https://doi.org/10.1557/PROC-169-1231