Abstract
Two antiperovskite-type ternary nitrides of InN M 3 ( M=Ni, Co) have been synthesized from In 2O 3 and Ni or Co powders under NH 3 atmosphere at 600 °C. InNCo 3 is a new ternary nitride whereas InNNi 3 was previously reported as InN 0.5Ni 3 with different nitrogen content. The lattice parameters refined by Rietveld method are 3.8445(1) Å for InNNi 3 and 3.8541(7) Å for InNCo 3, respectively. Both nitrides show metallic behaviors and below 70 K the T 2 temperature dependence of resistivity was observed indicative of a Fermi liquid behavior. The temperature dependence of the field-cooling (FC) and zero-field-cooling (ZFC) magnetization and time decay of thermoremanent magnetization indicate the spin-glass-like behavior in InN M 3 ( M=Ni, Co). The freezing temperatures for this behavior, T f , are about 300 K for InNNi 3 and 10 K for InNCo 3, respectively.
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