Magnetic properties of synthetic titanomagnetites |
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Authors: | A.G. Zvegintsev |
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Affiliation: | Institute of Physics, Siberian Department of Academy of Sciences of the U.S.S.R., 660036 Krasnoyarsk U.S.S.R. |
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Abstract: | Magnetic properties and crystal structure parameters of synthetic solid solutions Fe3O4Fe3TiO4, Fe2O4MgFe2O4 and Fe3O4Mg2TiO4 have been studied. Basic regularities in the behaviour of saturation magnetisation (Is), Curie temperature (TC) and cubic lattice parameter a during the substitution of Ti and Mg ions for Fe ions have been found. As the concentration of Ti ions increases, Is reduces from 70 Gs·cm3 g?1 to 0, TC changes from 580 to 130°C and a from 8.391 to 8.520 Å. Growth of the Mg concentration leads to changes in Is to 19.8 Gs·cm3, g?1, TC, to 440°C and a, to 8.360 Å. The full Fe ions substitution gives .Chemical compositions of the samples, in which the valency variation of Fe ions at oxidation leads to an increase in susceptibility and TC, have been determined. |
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