中国物理B ›› 2013, Vol. 22 ›› Issue (6): 67501-067501.doi: 10.1088/1674-1056/22/6/067501

所属专题: TOPICAL REVIEW — Magnetism, magnetic materials, and interdisciplinary research

• SPECIAL TOPIC --- Non-equilibrium phenomena in soft matters • 上一篇    下一篇

Mn-based antiperovskite functional materials: Review of research

童鹏a, 王铂森a, 孙玉平a b   

  1. a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
    b High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
  • 收稿日期:2013-04-26 出版日期:2013-05-01 发布日期:2013-05-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174295, 51001094, 91222109, 51171177, and 50701042) and the National Key Basic Research of China (Grant No. 2011CBA00111).

Mn-based antiperovskite functional materials: Review of research

Tong Peng (童鹏)a, Wang Bo-Sen (王铂森)a, Sun Yu-Ping (孙玉平)a b   

  1. a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
    b High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2013-04-26 Online:2013-05-01 Published:2013-05-01
  • Contact: Sun Yu-Ping E-mail:ypsun@issp.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174295, 51001094, 91222109, 51171177, and 50701042) and the National Key Basic Research of China (Grant No. 2011CBA00111).

摘要: Our recent research on the Mn-based antiperovskite functional materials AXMn3 (A: metal or semiconducting elements; X: C or N) is outlined. Antiperovskite carbides (e.g., AlCMn3) show large magnetocaloric effect comparable to those of typical magnetic refrigerant materials. Enhanced giant magnetoresistance up to 70% at 50 kOe (1 Oe = 79.5775 A·m-1) over a wide temperature span was obtained in Ga1-xZnxCMn3 and GaCMn3-xNix. In Cu0.3Sn0.5NMn3.2, negative thermal expansion (NTE) was achieved in a wide temperature region covering room temperature (α = -6.8 ppm/K, 150 K-400 K). Neutron pair distribution function analysis suggests the Cu/Sn-Mn bond fluctuation is the driving force for the NTE in Cu1-xSnxNMn3. In CuN1-xCxMn3 and CuNMn3-yCoy, the temperature coefficient of resistivity (TCR) decreases monotonically from positive to negative as Co or C content increases. TCR is extremely low when the composition approaches the critical points. For example, TCR is ~ 1.29 ppm/K between 240 K and 320 K in CuN0.95C0.05Mn3, which is one twentieth of that in the typical low-TCR materials (~ 25 ppm/K). By studying the critical scaling behavior and X deficiency effect, some clues of localized-electron magnetism have been found against the background of electronic itinerant magnetism.

关键词: antiperovskite, magnetocaloric effect, giant magnetoresistance, negative thermal expansion

Abstract: Our recent research on the Mn-based antiperovskite functional materials AXMn3 (A: metal or semiconducting elements; X: C or N) is outlined. Antiperovskite carbides (e.g., AlCMn3) show large magnetocaloric effect comparable to those of typical magnetic refrigerant materials. Enhanced giant magnetoresistance up to 70% at 50 kOe (1 Oe = 79.5775 A·m-1) over a wide temperature span was obtained in Ga1-xZnxCMn3 and GaCMn3-xNix. In Cu0.3Sn0.5NMn3.2, negative thermal expansion (NTE) was achieved in a wide temperature region covering room temperature (α = -6.8 ppm/K, 150 K-400 K). Neutron pair distribution function analysis suggests the Cu/Sn-Mn bond fluctuation is the driving force for the NTE in Cu1-xSnxNMn3. In CuN1-xCxMn3 and CuNMn3-yCoy, the temperature coefficient of resistivity (TCR) decreases monotonically from positive to negative as Co or C content increases. TCR is extremely low when the composition approaches the critical points. For example, TCR is ~ 1.29 ppm/K between 240 K and 320 K in CuN0.95C0.05Mn3, which is one twentieth of that in the typical low-TCR materials (~ 25 ppm/K). By studying the critical scaling behavior and X deficiency effect, some clues of localized-electron magnetism have been found against the background of electronic itinerant magnetism.

Key words: antiperovskite, magnetocaloric effect, giant magnetoresistance, negative thermal expansion

中图分类号:  (Metals and alloys)

  • 75.20.En
75.30.Sg (Magnetocaloric effect, magnetic cooling) 75.47.De (Giant magnetoresistance)