Magnetic Properties of Actinide Ions and Compounds.

Magnetic properties of actinide ions arise from the spin and orbital angular momentum of 5f electrons which systematize the actinide series. The 5f electrons are not so well localized as the 4f electrons in the rare earths and have energies comparable to those of the 6d and 7s electrons, which leads to greater variety in the properties of the actinides.In this report, the magnetic properties of actinide ions and compounds have been reviewed. The object of the description here is limited to the ions and compounds in which the 5f electrons are relatively localized, i.e. the crystal field theory is applicable to. The results of magnetic susceptibility and electron paramagnetic resonance absorption spectrum are mainly discussed.