Abstract
Electrical conductivity, thermoelectric power and dielectric constant of a Gd2Ti2O7 single crystal have been studied in the temperature range 300–1000 K. Gd2Ti2O7 is found to be an-type semiconductor with energy band gap 1.5 eV. It exhibits an extrinsic nature up to 675 K and an intrinsic nature above 675 K. The thermoelectric power increases with temperature in the region 300–675 K whereas it decreases with temperature in the region 675–1000 K. The dielectric constant increases slowly in the temperature range 300–675 K but this increase becomes fast in the temperature range 675–1000 K.
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References
V. A. Antonov andP. A. Arsenev,Phys. Stat. Solid (a)35 (1976) K 169.
B. M. Wanklyn,J. Mater. Sci. 7 (1972) 813.
Y. P. Yadava andR. A. Singh,Mater. Chem. Phys. 17 (1987) 259.
T. C. Hermann andJ. M. Honig, in “Thermoelectric power and electromagnetic effects and applications” (McGraw Hill, New York, 1976) p. 142.
M. S. Seltzer andR. I. Jaffee, in “Defect and transport in oxides” (Plenum Press, New York, 1974).
R. W. G. Wyckoff, in “Crystal structure”, Vol.3 (Interscience, New York, 1975) p. 17.
B. Conqulin andA. Blandin,Adv. Phys. 17 (1968) 281.
C. E. T. Goncalves Da Silva andL. M. Falicov,J. Phys. Chem: Solid State Physics 5 (1972) 63.
Y. A. Rocher,Adv. Phys. 11 (1962) 233.
R. Ramirez andL. M. Falicov,Phys. Rev. 13,3 (1971) 2425.
J. M. Ziman, in “Principles of the theory of solids” (Cambridge UP, London, 1964) p. 179.
C. Kittel, in “Introduction to solid state physics” (Wiley Eastern, New Delhi, 1971) p. 361.
H. Fröhlich,Adv. Phys. 3 (1954) 325.
G. R. Allcock,Adv. Phys. 5 (1956) 412.
J. Appel, in “Solid state physics” (Academic Press, New York, 1968) p. 193.
C. Kittel, in “Introduction to solid state physics” (Wiley Eastern, New Delhi, 1977).
J. P. Suchet, in “Electrical conduction in solid materials” (Pergamon Press, Oxford, 1975) p. 89.
C. P. Smyth, in ‘Dielectric behaviour and structure” (McGraw Hill, New York, 1955) p. 132.
G. P. Srivastava andY. P. Varshney,Physica 22 (1956) 584.
S. Chandra,Cand. J. Phys. 17 (1969) 970.
O. G. Palanna, A. L. Shashi Mohan, A. B. Biswas,Proc. Indian Acad. Sci. 86A (1977) 455.
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Pandit, A.K., Ansari, T.H., Singh, R.A. et al. Electrical conductivity, thermoelectric power and dielectric constant of a Gd2Ti2O7 single crystal. J Mater Sci 26, 6759–6763 (1991). https://doi.org/10.1007/BF02402671
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DOI: https://doi.org/10.1007/BF02402671