Paramagnetic saturation of lanthanum manganese nitrate, La2Mn3(NO3)12·24H2O, has been investigated at liquid He temperatures in a static as well as a dynamical way. With the aid of the molecular-field theory the Casimir and Du Pré dispersion and absorption curves are adapted explicitly to the phenomenon of saturation. A satisfactory agreement has been observed between theory and experiment.
Flokstra, J., Meijer, H. C., Bots, G. J. C., Verheij, W. A., & van der Marel, L. C. (1973). Investigation of paramagnetic saturation in lanthanum manganese nitrate. Physica, 63(2), 288-296. https://doi.org/10.1016/0031-8914(73)90314-5