Magnetic Properties of the Iron-Group Metal Phosphides

Abstract
We have investigated the temperature‐dependence of the magnetic moment of Cr3P, Mn3P, Fe3P and Ni3P including solid solutions of these compounds with each other. These measurements indicate Ni3P and Cr3P have a temperature‐independent Pauli‐type paramagnetism. Mn3P is antiferromagnetic (TN≈115°K) with a moment of 1.68 μB for Mn based on the high‐temperature susceptibility. Solid solutions of Fe3−xCoxP up to x=0.6 show that Co contributes a moment of 1.6 μB ferromagnetically aligned with the iron. In the Fe3−xNixP system, nickel acts as a diluent for all values of x. Solid solutions of Fe3−xMnxP up to x=1.5 could also be formed; in this case, antiferromagnetic ordering lowers the magnetic moment significantly. The variation of the magnetic moments with composition for the M3P series closely resembles the Slater‐Pauling curve.

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