Abstract

In order to monitor the peculiar temperature dependence of the magnetization of the compounds YCo4B and CeCo4B from an atornistic point of view, samples doped with 1% 57Fe were studied by MOssbauer spectroscopy. From the two Co-sites present in this structure (2c, 60, only the latter were found to be equipped by Fe. In the case of the Y-compound, the change of direction of the easy axis of magnetization could be confirmed. The broad maximum observed for the magnetization of the Ce-compound is not reflected by the 57Fe hyperfine field.

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