Abstract
The mechanism of NiCo 2O 4 formation was investigated by magnetic methods and thermogravimetry. This compound was obtained by simultaneous decomposition of cobalt(II) and nickel(II) salts in air at temperatures up to 350°C. It was shown that NiCo 2O 4 has the spinel structure of Co 2+[Ni 3+Co 3+]O 4. The decomposition process passes through the formation of paramagnetic Co 3+, Co 2+ and Ni 3+ ions, which were stabilized in the ferrimagnetic spinel lattice of NiCo 2O 4.
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