Abstract
The electrical conductivity of polycrystalline lithium-chromium ferrites substituted successively with Ti4+ was studied as a function of composition and temperature. The resistivity increased with composition and all the samples exhibited a change in slope in the resistivity-temperature curve. Two different regions with a large variation in activation energies were found. The dielectric constant and loss factor for different compositions were measured in the frequency range of 10kHz to 10 MHz. The dielectric permittivity showed a dispersion with frequency for all the samples. Peaks were observed for the samples with 0.4 ⩽ x ⩽ 0.8. The possible mechanisms involved are discussed.
Similar content being viewed by others
References
J. Smit andH. P. J. Wijn, “Ferrites”, Phillips Tech. Library (Cleaver-Home, London, 1959) p. 299.
E. J. Verwey, P. W. Haayman andF. C. Romeijn,J. Chem. Phys. 15 (1947) 181.
L. G. Van Uitert,ibid. 23 (1955) 1883.
Deepika Kothari, Sumitra Phanjoubam, J. S. Baijal, Chandra Prakash andPran Kishan,J. Phys. C 21 (1988) 6169.
N. Rezlescu, D. Condurache, C. Naum andE. Luca,Rev. Roum. Phys. 18 (1973) 727.
W. Kirsten,Phys. Status Solidi (a) 28 (1975) 447.
R. Manjula, V. R. K. Murthy andJ. Sobhandari,J. Appl. Phys. 59 (1986) 2929.
S. Phanjoubam, D. Kothari andJ. S. Baijal,Phys. Status Solidi (a) 111 (1989) 131.
O. S. Josyulu andJ. Sobhandari,ibid. 59 (1980) 323.
R. Satyanarayan andS. R. Murthy,ibid. 84 (1984) 655.
C. F. Jefferson andC. K. Baker,IEEE Trans. Mag. 4 (1968) 460.
E. J. W. Verwey andJ. H. De Boer,Rec. Trav. Chim. Pays-Bas 55 (1936) 531.
J. A. Kulkarni, K. Muraleedharan, J. K. Srivastav, V. R. Marathe, V. S. Darshne, C. R. K. Murthy andR. Vijayaraghavan,J. Phys. C 18 (1985) 2593.
R. Hohne, W. Kirsten andK. Melzer,Phys. Status Solidi (a) 22 (1974) K99.
F. F. Y. Wang,Amer. Ceram. Soc. Bull. 49 (1970) 499.
T. Matsui andJ. B. Wagner Jr,J. Electrochem. Soc. 124 (1977) 1141.
C. Prakash andJ. S. Baijal,J. Less-Common Metals 114 (1985) 241.
F. Haberey andH. P. J. Wijn,Phys. Status Solidi 26 (1968) 231.
J. C. Maxwell, “Electricity and Magnetism”, Vol. 1 (Oxford University Press, Oxford, 1929) Section 328.
K. W. Wagner,Ann. Phys. 40 (1913) 817.
N. Rezlescu andE. Rezlescu,Phys. Status Solidi (a) 23 (1974) 575.
P. V. Reddy andT. S. Rao,J. Less-Common Metals 86 (1982) 255.
C. G. Koops,Phys. Rev. 83 (1951) 121.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kothari, D., Phanjoubam, S. & Baijal, J.S. Electrical conduction and dielectric behaviour of the oxidic spinel Li0.5+0.5xCr0.3TixFe2.2−1.5XO4 . J Mater Sci 25, 5142–5146 (1990). https://doi.org/10.1007/BF00580142
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00580142