References
H. UEOKA,Ferroelectrics 7 (1974) 351.
T. MATSUOKA, Y. MATSUO, H. SUSAKI and S. HAYAKAWA,J. Am. Ceram. Soc. 55 (1974) 108.
H. BRAUER,Z. Angew. Phys. 23 (1967) 373.
W. HEYWANG,J. Mater. Sci. 6 (1971) 1214.
Idem, Solid State Electr. 7 (1961) 51.
G. H. JONKER,Mater. Res. Bull. 2 (1967) 401.
J. DANIELS and R. WERNICKE,Philips Res. Repts 31 (1976) 544.
P. GERTHSEN and B. HOFFMAN,Solid State Electr. 16 (1973) 617.
H. NEMOTO and I. ODA,J. Am. Ceram. Soc. 63 (1980) 398.
T. R. N. KUTTY, P. MURUGARAJ and N. S. GAJBHIYE,Mater. Lett. 2 (1984) 396.
T. R. N. KUTTY and P. MURUGARAJ,ibid. 3 (1985) (in press).
M. KUWABARA,Am. Ceram. Soc. Bull. 62 (1983) 708.
A. W. HORNIG, R. C. REMPEL and H. E. WEAVER,J. Phys. Chem. Solids 10 (1951) 1.
E. S. KIRKPATRICK, K. A. MÜLLER and R. S. RUBINS,Phys. Rev. 135A (1964) 86.
TH. VON WALDKIRCH, K. A. MÜLLER and W. BERLINGER,ibid. B5 (1972) 4324.
R. L. BERNEY and D. L. COWAN,ibid. B23 (1981) 37.
M. MULTANI,Mater. Res. Bull. 19 (1984) 25.
K. A. MÜLLER,J. Physique 42 (1981) 551.
H. J. HAGEMANN and H. IHRIG,Phys. Rev. B20 (1979) 3871.