Abstract
Characterizations of (50 − x) P2O5-x M-50V2O5 (M = Bi2O3, Sb2O3, and GeO2 and x=0 to 45 mol% M) and P2O5-Bi2O3 semiconducting oxide glasses have been made from studies of electrical conductivities (both a.c. and d.c.) in the temperature range 77 to 400 K. All these glasses showed some interesting non-linear variation of d.c. and a.c. conductivity, together with other properties for particular values of M (between 20 and 30 mol% M). Because the non-vanadate (1−x) P2O5-x Bi2O3 glasses also showed similar conductivity anomaly (minimum) around 25 mol% Bi2O3 with a corresponding maximum in the activation energy (W), it is concluded (in contradiction to earlier suggestions) that not only the ratio β (= V5+/V4+) but also the network-former ions in the vanadate glasses make a substantial contribution to the anomalous concentration variation of the physical properties of these glasses. The electrical conduction in these glasses is found to be mainly due to hopping of polarons in the adiabatic approximation. At low temperature, the d.c. conductivity obeys Mott's T −1/4 behaviour. The a.c. conductivity obeying the general ωs law (exponent s lying between 0.85 and 0.98) supports the theory based on the hopping over the barrier model.
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References
J. D. Mackenzie, “Modern Aspects of Vitreous State” (Butterworth, London, 1964).
H. Fritzsche, in “Amorphous and Liquid Semiconductors”, edited by J. Tauc (Plenum Press, London, 1974) p. 313.
H. Hirashima, Y. Watanabe and T. Yoshida, J. Non-Cryst. Solids 95 (1987) 825.
T. Yoshida, H. Hirashima and M. Kato, Yogyo-Kyokai-Shi 93 (1985) 244.
A. Ghosh and B. K. Chaudhuri, Ind. J. Phys. 58A (1984) 62.
Idem., in “Metallic and Semiconducting Glasses-II”, edited by A. K. Bhatnagar (Trans. Tech, Switzerland, 1986) p. 515.
Bh. V. J. Rao, J. Amer. Ceram. Soc. 49 (1966) 605.
Idem., ibid. 48 (1965) 311.
A. Ghosh and B. K. Chaudhuri, J. Non-Cryst. Solids 83 (1986) 151.
Idem., J. Mater. Sci. 22 (1987) 2369.
M. Sayer and A. Mansingh, Phys. Rev. B6 (1972) 4629.
V. K. Dhawan, A. Mansingh and M. Sayer, J. Non-Cryst. Solids 51 (1982) 87.
G. S. Linsley, A. E. Owen and F. M. Hayatee, ibid. 4 (1970) 208.
C. H. Chung, J. D. Mackenzie and L. Murawski, Rev. Chimie Minerale 16 (1979) 308.
L. Murawski, C. -H. Chung and J. D. Mackenzie, J. Non-Cryst. Solids 32 (1979) 91.
C. H. Chung and J. D. Mackenzie, ibid. 42 (1980) 357.
J. Appel, in “Solid State Physics”, edited by F. Seitz, D. Turnbull and H. Ehrenreich, Vol. 21 (Academic Press, London and New York, 1968) p. 193.
R. M. Brown, PhD thesis, University of Illinois, 1966.
K. K. Som and B. K. Chaudhuri, J. Mater. Sci. 25 (1990) 000.
B. K. Chaudhuri, K. Chaudhuri and K. K. Som, J. Phys. Chem. Solids 50 (1989) 1137.
B. K. Chaudhuri, unpublished.
I. G. Austin and N. F. Mott, Adv. Phys. 18 (1969) 41.
N. F. Mott, J. Non-Cryst. Solids 1 (1968) 1.
N. F. Mott and E. A. Davis, “Electronic Processes in NonCrystalline Materials”, 2nd Edn (Clarendon, Oxford, 1979).
A. Miller and E. Abrahams, Phys. Rev. 120 (1960) 745.
L. Murawski and O. Gzowski, Acta Phys. Polanica A50 (1976) 463.
L. Pauling, “Nature of Chemical Bonds and the Structure of Molecules and Crystals”, 3rd Edn (Cornell University Press, Ithaca, New York, 1960) p. 98.
A. Mansingh, J. K. Vaid and R. P. Tandon, J. Phys. C. Solid State Phys. 8 (1975) 1023.
A. Mansingh, V. K. Dhawan and M. Sayer, Phil. Mag. B 48 (1983) 215.
G. E. Pike, Phys. Rev. B6 (1972) 1572.
S. R. Elliott, Phil. Mag. 36 (1977) 1291.
Idem., Adv. Phys. 36 (1987) 135.
A. R. Long, Adv. Phys. 31 (1982) 553.
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Som, K.K., Chaudhuri, B.K. Non-linear concentration-dependent electrical properties of some semiconducting vanadate glasses. J Mater Sci 26, 1228–1235 (1991). https://doi.org/10.1007/BF00544460
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DOI: https://doi.org/10.1007/BF00544460