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The Structure of Interfaces in Oxide Heterojunctions Formed by CVD

Published online by Cambridge University Press:  25 February 2011

Lisa A. Tietz ,
Scott. R. Summerfelt  and
C. Barry Carter
Lisa A. Tietz
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca, NY 14853
Scott. R. Summerfelt
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca, NY 14853
C. Barry Carter
Affiliation:
Cornell University, Department of Materials Science and Engineering, Ithaca, NY 14853
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Abstract

Weak-beam imaging is used to characterize the interface structure of hematite (α-Fe2O3)/ sapphire (α-Al2O3) heterojunctions parallel to (0001). The heterojunctions were prepared by lowpressure chemical vapor deposition of hematite directly onto electron-transparent sapphire substrates. Bright-field imaging and selected-area diffraction show that the growth is epitactic. The 5.5% lattice misfit at the interface is found to be accommodated by one of two different hexagonal dislocation networks: (1) b = 1/3<1210> or (2) b = 1/3<1010>. The latter are associated with a “basal twin”-type orientation relationship of the hematite and the alumina.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 159: Symposium C – Atomic Scale Structure of Interfaces , 1989 , 209
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1. Stowell, M.J. in Epitaxial Growth. Part B, edited by Matthews, J.W. (Academic Press, New York, 1975) pp. 437–489.Google Scholar
2. Heuer, A.H. and Castaing, J. in “Structure and Properties of MgO and Al2O3 Ceramics,” Advances in Ceramics, Vol. 10, edited by Kingery, W.D. (The American Ceramic Society, Columbus, OH, 1984) pp. 238–257.Google Scholar
3. Morrissey, K.M. and Carter, C.B in “Character of Grain Boundaries,” Advances in Ceramics, Vol. 6, edited by Yan, M.F. and Heuer, A.H. (The American Ceramic Society, Columbus, OH, 1983) pp. 85–95.Google Scholar
4. Kronberg, M.L., Acta Met. 5, 507 (1957).Google Scholar
5. Bursill, L.A. and Withers, R.L., Phil. Mag. 40, 213 (1979).Google Scholar
6. Tietz, L.A., Summerfelt, S.R., English, G.R., and Carter, C.B., Appl. Phys. Lett. 55, 1202 (1989).Google Scholar
7. Tietz, L.A., Summerfelt, S.R., English, G.R., and Carter, C.B., these proceedings.Google Scholar
8. Susnitzky, D.W. and Carter, C.B., J. Am. Ceram. Soc. 62, C–217 (1986).Google Scholar
9. The CRC Handbook of Physical Properties of Rocks, Vol. 3, edited by Carmichael, R.S. (CRC Press, Boca Raton, FL, 1984) pp. 88–90.Google Scholar