Abstract
The specific heats of the ordered alloys Mn3AlC and Mn3ZnC were measured from −150 to 100 °C. A single higher-order anomaly was observed at the Curie temperature (−9 °C) of Mn3AlC, indicating that a ferromagnetic state existed above −150 °C. The two specific heat anomalies observed for Mn3ZnC at −35 and 65 °C showed that two co-operative magnetic transitions occurred in this alloy.

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