Abstract
A series of Hg1−xCdxTe alloy crystals was grown by high-temperature-gradient directional solidification at furnace translation rates ranging from 0.068 to 1.12 µm/s. For several ingots, the measured longitudinal compositional profiles were fitted to theoretical profiles to estimate the magnitude of D, the liquid HgTe-CdTe interdiffusion coefficient. The best-fit value of D was about 5.5 × 105 cm2/s. The majority of the ingots showed significant radial compositional variations along the growth axis. These variations are attributed, at least in part, to fluid flows ahead of the growth interface. The results are discussed in terms of the heat transfer characteristics of the alloy/ampule/ furnace system and the effects of these characteristics on the shape and stability of the growth interface in a 1−g environment.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J. Blair and R. Newnham, Metallurgy of Elemental and Compound Semiconductors, (Interscience Publishers, New York, 1961), Vol. 12, p. 393.
T. C. Harman, in Physics and Chemistry of II-VI Compounds, M. Aven and J. S. Prener, Eds., (North Holland Publishing Co. Amsterdam, 1967), p. 785.
B. Ray and P. M. Spencer, Phys. Stat. Sol. 22, 371 (1967).
F. R. Szofran and S. L. Lehoczky, J. Electronic Mater. (in press).
R. F. Brebrick and A. J. Strauss, J. Phys. Chem. Solids 26, 989 (1965).
Maurice J. Brau, U. S. Patent No. 3 849 205 (1974).
B. E. Bartlett, P. Capper, J. E. Harris, and M. J. T. Quelch, J. Crystal Growth 46, 623 (1979).
V. G. Smith, W. A. Tiller, and J. W. Rutter, Can. J. Phys. 33, 723 (1953).
S. L. Lehoczky, F. R. Szofran, and B. G. Martin, “Advanced Methods for Preparation and Characterization of Infrared Detector Materials,” McDonnell Douglas Report MDC Q0717, NASA Contract NAS8-33107 (July 1980).
J. C. Woolley and B. Ray, J. Phys. Chem. Solids 13, 151 (1960).
H. A. Bowman, R. M. Schooner, and M. W. Jones, J. Res. Natl. Bur. Std. (U. S.) 71C, 179 (1967).
.J. C. Clayton, M. Davidson, and D. C. Gillies, private communications.
M. Davidson, J. C. Clayton, and D. C. Gillies, private communications.
C. E. Chang and W. R. Wilcox, J. Crystal Growth 21, 135 (1974).
Acknowledgments
The authors are grateful to NASA Marshall Space Flight Center for support of this work. Technical discussion with Drs. M. Davidson, J. C. Clayton, D. Gillies, C. J. Summers, and C. R. Whitsett were helpful.
Author information
Authors and Affiliations
Additional information
This work was performed under NASA contract NAS8-33107.
Rights and permissions
About this article
Cite this article
Lehoczky, S.L., Szofran, F.R. Directional Solidification and Characterization of Hg1−xCdxTe Alloys. MRS Online Proceedings Library 9, 409–420 (1981). https://doi.org/10.1557/PROC-9-409
Published:
Issue Date:
DOI: https://doi.org/10.1557/PROC-9-409