Appandairajan, N. K. ; Gopalakrishnan, J. (1978) A study of Co3-xNixO4(O ≤x ≤ 1) system Proceedings of the Indian Academy of Sciences - Chemical Sciences, 87 (4). pp. 115-120. ISSN 0253-4134
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Abstract
A series of solid solutions of composition Co3-xNixO4 has been studied. For 0 ≤ x ≤ 1·1 the members crystallize in the cubic spinel structure Measurements of dc electrical conductivity and Seebeck coefficient show that there is a transition from semiconducting state to semi-metallic state around x=0·5-0·6. All compositions withx>0.5 are semimetallic and ferrimagnetic. The results have been rationalised on the basis of the cation distribution (Co2+)t [NixIIICo2-xIII]0O4 for the solid solutions which permits formation of σ*(eg) band through strong covalent interaction between octahedral-site low spin CoIII/NiIII and oxide ion in the spinel structure.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
ID Code: | 84373 |
Deposited On: | 25 Feb 2012 05:41 |
Last Modified: | 19 May 2016 00:50 |
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