Abstract
The magnetic susceptibility of neodymium metal has been measured over the temperature range of 20.4\ifmmode^\circ\else\textdegree\fi{}K-300\ifmmode^\circ\else\textdegree\fi{}K. The metal was found to obey a Curie-Weiss law above 145\ifmmode^\circ\else\textdegree\fi{}K with a paramagnetic Curie point of -16\ifmmode^\circ\else\textdegree\fi{}K and an effective moment of 3.68 Bohr magnetons. Near 145\ifmmode^\circ\else\textdegree\fi{}K there appears to be a change in slope of the curve of $\frac{1}{\ensuremath{\chi}}$ vs $T$. From 145\ifmmode^\circ\else\textdegree\fi{}K to 31.5\ifmmode^\circ\else\textdegree\fi{}K the metal again obeys a Curie-Weiss law with a paramagnetic Curie point of about 1\ifmmode^\circ\else\textdegree\fi{}K and an effective moment of 3.35 Bohr magnetons. The low-field susceptibility at 20.4\ifmmode^\circ\else\textdegree\fi{}K is much larger than predicted by the low-temperature Curie-Weiss law, and the susceptibility has a definite field dependence.
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