Pnictides magnetic measurements

The calculated curve reproduces the measurements closely, except at very low temperatures. We see that the temperature dependent moment magnetism of the Sm pnictides has a very complicated nature and its interpretation is not possible without detailed knowledge of spectroscopic data, which in turn can be obtained from different experiments, mostly specific-heat measurements. 

Fig, 36. Magnetic moment versus applied magnetic field for Nd pnictides. The powder measurements on NdP are taken from Tsuchida et al. (1969). 

The influence of the CEF on the magnetic properties of NpP was studied theoretically for all pnictides by Lam and Fradin (1974). The state of the art of powder measurements was summarized by Lander (1978). High-field powder measurements on NpAs were reported by Blaise et al. (1983). Measurements on powder of highly anisotropic compounds do not make sense, although the authors claim that they were able to bring the samples into a ferromagnetic state - a conclusion which turned out to be wrong. The observed reduction of the ordered moment was theoretically explained by Lam and Ellis (1985), based on a hybridization mechanism - a theory which still holds today. Mossbauer spectroscopy on NpSb by Sanchez et al. (1988) could be performed with no restrictions on the powdered samples. 

Earlier measurements of the magnetic susceptibility of Yb pnictides yielded values for the paramagnetic moment and the paramagnetic Curie temperatures. These measurements are reported by Didchenko and Gortsema (1963), Busch (1967), Bodnar... 

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