Order-disorder in A2M3+M5+O6 perovskites

Abstract

Using x-ray and neutron diffraction data, the degree of order of the octahedral site cations has been determined for the perovskites Sr2AlNbO6 and Sr2AlTaO6, which have been prepared by several different methods and annealed at temperatures up to 1690 °C. The degree of order generally increases with increasing synthesis temperature. The amount of cation ordering is, therefore, primarily controlled by kinetic processes and not by thermodynamic equilibrium considerations. Increased order obtained with increased heating time confirms this general kinetic limitation on the degree of order. However, annealing Sr2AlNbO6 in the highest temperature region resulted in some decrease in order, presumably due to thermodynamic considerations. The cubic edge of both compounds decreases significantly with increasing order. Ordered domains are separated by antiphase boundaries which occur in high concentrations. The cubic cell edge within the ordered domains is significantly smaller than the overall cell edge when the concentration of antiphase boundaries is high. The antiphase boundaries cause significant lattice strain which generally decreases as the concentration of antiphase boundaries decreases. Results on other A2M3+M5+O6 systems are briefly presented.

This is a preview of subscription content, access via your institution.

We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

References

  1. 1

    R. E. Newnham, Chemistry of Electronic Ceramic Materials, NIST Spec. Pub. #804 (1991), p. 39.

    Google Scholar 

  2. 2

    H. D. Rosenfeld, T. Egami, and A. Bhalla, Chemistry of Electronic Ceramic Materials, NIST Spec. Pub. #804 (1991), p. 93.

    Google Scholar 

  3. 3

    H. D. Rosenfeld, T. Egami, and A Bhalla, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 38, 559 (1991).

    CAS  Article  Google Scholar 

  4. 4

    C. A. Randall, A. S. Bhalla, T. R. Shrout, and L. E. Cross, J. Mater. Res. 5, 829 (1990).

    CAS  Article  Google Scholar 

  5. 5

    Z. C. Zang, C. Caranoni, I. Siny, G. Hihoul, and C. Boulesteix, J. Solid State Chem. 89, 308 (1990).

    Article  Google Scholar 

  6. 6

    A. W. Sleight, Thesis, Dissertation Abstracts 24, 64–3565 (1964); University of Connecticut (1963).

    Google Scholar 

  7. 7

    J. B. Goodenough and J. M. Longo, Landolt-Bomstein 4a, 126 (1970).

    Google Scholar 

  8. 8

    C. D. Brandle and V.J. Fratello, J. Mater. Res. 5, 2160 (1990).

    CAS  Article  Google Scholar 

  9. 9

    L. E. Cross and R. Roy, 3rd Annual DARPA Workshop on High Temperature Superconductivity, Seattle, WA (1991).

  10. 10

    R. E. Fahey, A. J. Strauss, and A. C. Anderson, J. Cryst. Growth 128, 672 (1993).

    CAS  Article  Google Scholar 

  11. 11

    B. Han, D. Neumayer, B.H. Goodreau, T.J. Marks, H. Zhang, and V. P. Dravid, Chem. Mater. 6, 18 (1994).

    CAS  Article  Google Scholar 

  12. 12

    A. T. Findikoglu, C. Doughty, S. Bhattacharya, Qi Li, X. X. Xi, T. Venkatesan, R.E. Fahey, A.J. Strauss, and J.M. Phillips, Appl. Phys. Lett. 61 (14), 1718 (1992).

    CAS  Article  Google Scholar 

  13. 13

    F. Galasso, L. Katz, and R. Ward, J. Am. Chem. Soc. 81, 820 (1959).

    CAS  Article  Google Scholar 

  14. 14

    S. Nomura and T. Nakagawa, J. Phys. Soc. Jpn. 30, 491 (1971).

    CAS  Article  Google Scholar 

  15. 15

    F. S. Galasso, Structure, Properties and Preparation ofPerovskite-Type Compounds (Pergamon Press, Oxford, 1969).

    Google Scholar 

  16. 16

    G. K. Williamson and W. H. Hall, Acta Metall. 1, 22 (1953).

    CAS  Article  Google Scholar 

  17. 17

    F. S. Galasso and L. Katz, Acta Crystallogr. 14, 647 (1961).

    CAS  Article  Google Scholar 

  18. 18

    The DiFFaX software is based on an algorithm described in M. M. J. Treacy, J.M. Newsam, and M.W. Deem, Proc. R. Soc. London A 433, 499 (1991).

Download references

Author information

Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Woodward, P., Hoffmann, RD. & Sleight, A.W. Order-disorder in A2M3+M5+O6 perovskites. Journal of Materials Research 9, 2118–2127 (1994). https://doi.org/10.1557/JMR.1994.2118

Download citation