Structural,magnetic and electrical study of CoMnAlO4 |
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| Authors: | S G Joshi D K Kulkarni P V Khandekar |
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| Affiliation: | (1) Department of Physics, Institute of Science, 440 001 Nagpur, India |
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| Abstract: | A spinel CoMnAlO4 has been synthesised by the oxide method. It has a tetragonal structure withA=8.10 A andC=8.22 A. A break is found in the plot of logρ against 1/T at 573°K when activation energy changes from 0.62 eV to 0·52 eV. The electrical properties show that it can be regarded as
a properly substituted CoMn2O4 by Al+3 ions. It is paramagnetic withC
M = 4.72 and ϑ
a
= −298°K. These results show the ionic configuration of the compound as Co+2 Mn+3 Al+3]O4. |
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| Keywords: | Spinel magnetic susceptibility electrical resistivity ionic configuration |
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