Abstract
The formation of Yb-123 has been studied at different temperatures in air and in reduced oxygen partial pressure. It is found that the stability and/or the formation kinetics of Yb-123 phase is a major hurdle in manufacturing phase-pure Yb-123 in air. However, under reduced oxygen partial pressure, Yb-123 forms rapidly and more than 90% phase-pure Yb-123 is achieved within three sintering steps. Rods made from this powder were melt-processed in air and showed a T c of 90 K. Kinetic studies performed by interrupting the growth during the directional solidification of these rods revealed a growth mechanism similar to that of Y-123 and a maximum growth rate of 7.2 mm/h for a stable planar interface. EPMA of the interface showed the liquid to be rich in barium cuprates with a Ba:Cu ratio of 1:3.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
M. K. Wu, J. R. Ashburn, C. L. Trong, P. H. Hor, R. L. Meng, L. Gao, Z. J. Huang, Y. Q. Wang, and C. W. Chu, Phys. Rev. Lett. 58, 7115 (1987).
S. Tsurumi, M. Hikita, T. Iwata, K. Semba, and S. Kurihara, Jpn. J. Appl. Phys. 26, L857 (1987).
Y. Nakabayashi, Y. Kobo, T. Manako, H. Tabuchi, A. Ochi, K. Utsumi, H. Igarashi, and M. Yonezawa, Jpn. J. Appl. Phys. 27, L64 (1988).
J. A. Hodges, P. Imbert, and G. Jehanno, Solid State Commun. 64, 1209 (1987).
P. Somasundaram, R. A. Mohanram, A. M. Umarji, and C. N. R. Rao, Mater. Res. Bull. 25, 331 (1990).
V. Badri and U. V. Varadaraju, Mater. Res. Bull. 25, 331 (1990).
Y. K. Du, G. C. Che, S. L. Jia, and Z. X. Zhao, J. Solid State. Chem. 112, 406 (1994).
J. M. Tarascon, W. R. McKinnon, L. H. Greene, G. W. Hull, and E. M. Vogel, Phys. Rev. B 36, 226 (1987).
M. Kamino, K. Takahashi, T. Yokoo, Y. Yoshisato, and S. Nakano, Jpn. J. Appl. Phys. 29, L580 (1990).
H. S. Chen, S. H. Lou, A. R. Kortan, and L. C. Kimerling, Appl. Phys. Lett. 53, 705 (1988).
L. F. Schneemeyer, E. M. Gyorgy, and J. V. Waszczak, Phys. Rev. B 36, 8804 (1987).
T. Mochida, M. Takahashi, S. Goshima, N. Sakai, S. I. Yoo, and M. Murakami, Superlattices and Microstructures 21A, 37 (1997).
L. D. Woolf, S. S. Pak, and T. L. Figueroa, Supercond. Sci. Technol. 9, 1105 (1996).
S. P. Athur, V. Selvamanickam, U. Balachandran, and K. Salama, J. Mater. Res. 11, 2976 (1996).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Athur, S.P., Putman, P., Balachandran, U. et al. Phase Formation and Melt Processing of Yb-123. Journal of Superconductivity 11, 525–531 (1998). https://doi.org/10.1023/A:1022670809652
Issue Date:
DOI: https://doi.org/10.1023/A:1022670809652