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Incomplete magnetic ordering in Fe2(1−y)Mg1+y Ti y O4 spinels with intermediate compositiony

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Abstract

Static magnetization measurements on the ferrimagnetic spinels Fe2(1−y)Mg1+y Ti y O4 withy=0.3, 0.4, 0.5, and 0.6 show that these compounds have no well-defined orderdisorder transition temperature and that their ferrimagnetism may not be described in terms of the Néel theory. From the Mössbauer spectra we conclude that a temperature dependent number of the ferric ions does not participate in the ferrimagnetism of those compounds with compositiony≧0.4. The explanation of the observed magnetic and Mössbauer properties is based on the assumption that each ferric ion must have at least two magnetic linkages of the type Fe 3+A −O2−−Fe 3+B in order to couple its magnetic moment to the neighbouring ones over the entire temperature interval between 0 K and the respective Néel temperature.

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Authors and Affiliations

  1. Laboratory for Magnetism, University of Ghent, Proeftuinstraat 86, B-9000, Ghent, Belgium

    E. De Grave, C. Dauwe, A. Govaert & J. De Sitter

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  1. E. De Grave
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  2. C. Dauwe
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  3. A. Govaert
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  4. J. De Sitter
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De Grave, E., Dauwe, C., Govaert, A. et al. Incomplete magnetic ordering in Fe2(1−y)Mg1+y Ti y O4 spinels with intermediate compositiony . Appl. Phys. 12, 131–136 (1977). https://doi.org/10.1007/BF00896138

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  • DOI: https://doi.org/10.1007/BF00896138

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