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  Physics Express 2013, 3: 33
  Research Article
The magnetic and electrical transport properties of the Co-doped antiperovskite compounds CuNMn3-xCox (0=x=0.15)
  J. C. Lina, P. Tonga, B. S. Wanga, S. Lina, W. J. Lua, B. C. Zhaoa, Y. P. Suna,b  
a Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
b High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China

  The magnetic and transport properties for polycrystalline samples CuNMn3-xCox (0=x=0.15) have been investigated. The transition temperature of the first-order non-collinear ferromagnetic to paramagnetic phase decreases with x in slight doping level (x=0.05), while increases with x in higher doping level (x>0.05). Besides, another first-order transition where the carrier charges and spins are closely coupled is observed at low temperatures for x=0.05 and 0.07. As x increases, the saturated magnetization at 5K reduces and the Curie-Weiss temperature changes gradually from positive to negative, indicating the antiferromagnetic interaction that competes with the FM interaction is enhanced. In addition, the magnetic coercivity is enhanced upon Co doping.
  Antiperovskite; Magnetic property; Ferromagnetism  

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