Nearly zero temperature coefficient of resistivity in antiperovskite compound CuNMn3
Nearly zero temperature coefficient of resistivity in antiperovskite compound CuNMn3
复制标题
DOI：
10.1016/s0038-1098(01)00395-7
复制
发表时间：
2001-01-01
影响因子：
2.1
通讯作者：
Hur, NH
中科院分区：
文献类型：
--
作者：
Chi, EO;Kim, WS;Hur, NH
研究了具有反钙钛矿结构的锰基化合物CuNMn3的结构、磁性和输运性质随温度的变化。在150K附近发生亚铁磁性转变，这与立方到四方对称性的结构转变温度一致。在150K以下，该化合物的电阻率表现为金属行为。然而，在150K以上，电阻率随温度的变化几乎可以忽略不计，表现出几乎为零的电阻温度系数(TCR)。室温附近的TCR值约为46pprn/K，比纯金属铜、铝的TCR值小约两个数量级。(C)爱思唯尔科学有限公司出版的2001年。
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.