Abstract
Schematic energy band diagrams for the genesis of charge carriers in non-metallic rare-earth solids have been presented. It has been shown that positions of 4f bands have significant effect on the genesis and nature of charge carriers, their conduction mechanism and magnitude of electrical conductivity (σ) and Seebeck coefficient (S) of the solid. Relevant relations have been given for bothσ and S in different situations. Experimental data on rare-earth sesquioxides (R2O3), rare-earth tungstates [R2(WO4)3] and rare-earth molybdates [R2(MoO4)3] in the intrinsic range have been explained as examples for the validity of energy band diagrams.
Similar content being viewed by others
References
Y. A. Rochar,Adv. Phys. 11 (1962) 233.
B. Conqblin andA. Blandin,ibid. 17 (1968) 28.
C. E. T. Goncalves Dasilva andL. M. Falicov,J. Phys. C: Solid State Phys. 5 (1972) 63.
R. Ramirez andL. M. Falicov,Phys. Rev. B3 (1971) 2425.
A. J. Bosman andH. J. Van Daal,Adv. Phys. 19 (1970) 1.
T. C. Herman andJ. M. Honig, “Thermoelectric and Thermomagnetic Effects and Applications”, (McGraw Hill, New York 1967) 142.
G. C. Jain andW. B. Berry, “Transport Properties of Solid and Solid State Energy Conversion”, (Tata McGraw Hill Publishing Company Ltd., Bombay, New Delhi 1972) p. 37.
G. Brauer, “Progress in Science and Technology of Rare-Earths”, edited by L. Eyring (Pergamon Press, Oxford 1966) 312.
H. B. Lal andN. Dar,Indian J. Pure Appl. Phys. 14 (1976) 788.
H. B. Lal, B. K. Verma andN. Dar,Indian J. Cryogenics 1 (1976) 119.
H. B. Lal, V. Pratap andN. Dar,Indian J. Pure Appl. Phys. 15 (1977) 366.
H. B. Lal, B. K. Verma andN. K. Sanyal,Proc. Nam. Acad. Sci. India 47A (1977) 1.
V. Pratap, B. K. Verma andH. B. Lal,ibid. 48A (1978) 1.
B. K. Verma, V. Pratap andH. B. Lal,Indian J. Pure Appl. Phys. 18 (1980) 150.
H. B. Lal,J. Phys. C: Solid State Phys. 13 (1980) 3969.
H. B. Lal, V. Pratap andA. Kumar,Pramana 10 (1978) 409.
L. H. Brixner andA. W. Sleight,Mater. Res. Bull. 8 (1973) 1269.
H. B. Lal andN. Dar,J. Phys. Chem. Solids 38 (1977) 161.
N. Dar andH. B. Lal,Pramana 11 (1978) 705.
Idem andIdem,Mater. Res. Bull. 14 (1979) 1263.
B. K. Verma andH. B. Lal,Mater. Res. Bull. 16 (1981) 1579.
V. Pratap andH. B. Lal,Nam. Acad. Sci. Lett. 1 (1978) 38.
A. K. Tripathi andH. B. Lal,J. Phys. Soc. Jpn 49 (1980) 1896.
V. Pratap, K. Gaur and H. B. Lal,Mater. Res. Bull. 22 (1987) 1381.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Lal, H.B., Gaur, K. Electrical conduction in non-metallic rare-earth solids. J Mater Sci 23, 919–923 (1988). https://doi.org/10.1007/BF01153989
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01153989