Magnetic Susceptibility of Liquid Alloys of Copper with Cobalt, Iron, Manganese, and Chromium

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Abstract
A systematic investigation has been made on the magnetic susceptibility of a series of transition metals dissolved in molten copper at temperatures up to 1600°C. These molten metals are miscible in all proportions except for the Cu-Cr system. The susceptibilities of the Cu–Co and Cu–Fe alloys follow the Curie-Weiss law. The Curie constant is roughly proportional to the concentration of Co or Fe. The paramagnetic Curie temperature for the Cu–Co system rises monotonously with the concentration of Co, while that for the Cu–Fe system shows a maximum at an intermediate composition. In the Cu–Mn and Cu–Cr systems, only the Cu-rich alloys show the Curie-Weiss paramagnetism, while the alloys containing more than 50% Mn or more than 5% Cr show rather temperature-independent paramagnetism.