Abstract
Pronounced singularities of orbital magnetic susceptibility, χ, are demonstrated experimentally and theoretically for RM3 alloys and compounds. The degeneracy points of the electronic energy bands close to the Fermi level are found to be responsible for the anomalous diamagnetism in YbSn3, YbPb3, CaSn3, and LaIn3-xSnx alloys. The appearance and smearing of these anomalies with temperature and impurities are analyzed, and corresponding band structure and scattering parameters are determined.
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