The temperature dependent structural, magnetic, and transport properties of a Mn-based compound CuNMn3 with an antiperovskite structure were investigated. A ferrimagnetic transition occurs near 150 K, which coincides with the structural transition temperature from cubic to tetragonal symmetry. Below 150 K, the resistivity of this compound shows a metallic behavior. Above 150 K, however, the variation of resistivity with temperature is almost negligible, exhibiting nearly zero temperature coefficient of resistivity (TCR). Its TCR value is about 46 pprn/K near room temperature, which is about two orders of magnitude smaller than those of pure metals like Cu and Al. (C) 2001 Published by Elsevier Science Ltd. References: 12
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