Abstract
Tl-based superconductors of initial composition Tl:Ca:Ba:Cu equal to 2:2:2:3 and 1:3:1:3 were heated in oxygen at pressures of 104 to 6 x 105 Pa. The 2:2:2:3 composition formed primarily the 2-layer superconductor with zero resistance from 77 to 104 K. The 1:3:1:3 composition formed nearly phase pure 3-layer superconductor with a maximum zero resistance temperature of 120 K. Application of hyperbaric pressure influenced phase purities and transition temperatures slightly; phase purities decreased significantly with application of hypobaric pressures.
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References
A. Schilling, H. R. Ott, and F. Hulliger. Physica C 157. 144 (1989).
D. S. Ginley, J. F. Kwak, E. L. Venturini. B. Morosin, and R. J. Baughman, Physica C 160. 42 (1989).
I. K. Gopalakrishnan, P. V. P. S. S. Sastry, H. Rajagopal, A. Sequeira, J. V. Yakhmi. and R. M. Iyer, Physica C 159. 811 (1989) .
K. C. Goretta, D. Shi, B. Malecki, M. C. Hash, and I. Bloom, Supercond. Sci. Tech. 2, 192 (1989).
N. Uno, N. Enomoto, Y. Tanaka, and H. Takami. Jpn. J. Appl. Phys. 27, L1003 (1988).
U. Balachandran, R. B. Poeppel, J. E. Emerson, S. A. Johnson. M. T. Lanagan. C. A. Youngdahl, D. Shi, K. C. Goretta, and N. G. Eror, Mater. Lett. 8. Dec. issue (1989).
F. A. Karbarz, O. D. Lacy, K. C. Goretta, U. Balachandran, D. Shi, J. G. Chen, M. Xu, and M. C. Hash. Mater. Res. Bull.. in press.
S. S. P. Parkin. V. Y. Lee. E. M. Engler. A. I. Nazzal, T. C. Huang. G. Gorman, R. Savoy, and R. Beyers, Phys. Rev. Lett. 60. 2539 (1988).
R. M. Iyer. G. M. Phatak, K. Gangadharan, M. D. Sastry, R. M. Kadam. P. V. P. S. S. Sastry, and J. V. Yakhmi, Physica C 160. 155 (1989).
Z. Z. Sheng, L. Sheng, H. M. Su. and A. M. Hermann. Appl. Phys. Lett. 53. 2686 (1988).
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Goretta, K.C., Routbort, J.L., Shi, D. et al. Hyper- and Hypobaric Processing of T1-Ca-Ba-Cu-O Superconductors. MRS Online Proceedings Library 169, 365–368 (1989). https://doi.org/10.1557/PROC-169-365
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DOI: https://doi.org/10.1557/PROC-169-365