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キーワード:
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要旨:
We have investigated the influence of deviations from stoichiometry on
the metallurgical, superconducting and magnetic properties of UNi2Al3
and UPd2Al3. Deviations from stoichiometry in UNi2Al3 generally increase
the width of the superconducting transition and can lead to a complete
suppression of the anomalies related to the antiferromagnetic (AF)
ordering. By contrast, in UPd2Al3 we have observed a reduction in the
superconducting transition temperature T-c whereas the AF transition is
not affected. We discuss the implication of these results on the
metallurgical phase diagram and on the nature of both the
superconducting and the AF state of these compounds.
