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Physics Express 2013, 3: 33
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Research Article
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The magnetic and electrical transport properties of the Co-doped antiperovskite compounds CuNMn3-xCox (0=x=0.15)
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J. C. Lina, P. Tonga, B. S. Wanga, S. Lina, W. J. Lua, B. C. Zhaoa, Y. P. Suna,b
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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
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Abstract |
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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.
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Keywords |
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Antiperovskite; Magnetic property; Ferromagnetism
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