☆ 4.7 Article

Tunable temperature coefficient of resistivity in C- and Co-doped CuNMn3

SCRIPTA MATERIALIA (2011)

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期刊

SCRIPTA MATERIALIA
卷 65, 期 5, 页码 452-455

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.05.035

关键词

Zero TCR; Intermetallic compound; Electrical resistivity; Electronic structure; Doped CuNMn3

类别

Nanoscience & Nanotechnology Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering

资金

  1. National Key Basic Research [2007CB925002, 2011CBA00111]
  2. National Natural Science Foundation of China [50701042, 51001094, 10974205, 10804111]
  3. Hefei Institutes of Physical Science, Chinese Academy of Sciences [O84N3A1133]

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Antiperovskite intermetallic compounds, including CuN1-xCxMn3 and CuNMn3-yCoy, 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. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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