Abstract
Antiperovskite intermetallic compounds, including CuN 1− x C x Mn 3 and CuNMn 3− y Co y , have been synthesized. The temperature coefficient of resistivity (TCR) decreases with increasing dopant and changes the sign from positive to negative. For x = 0.05, TCR is only 1.29 ppm K −1 between 240 and 320 K. Zero TCR will appear at certain doping levels (0.05 ⩽ x ⩽ 0.07 or 0.2 ⩽ y ⩽ 0.3), indicating great commercial prospects. The possible reason for zero TCR is analyzed based on the optimization of the electronic structure and electron–phonon scattering.
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