Abstract
In the compound YbPb3, the anomalous diamagnetism of which is due to the presence of a point of degeneracy of the energy bands near the Fermi level, the influence of hydrostatic pressure of up to 2kbar on the magnetic susceptibility at fixed temperatures of 78 and 300K. A theoretical analysis of the experimental data shows that appreciable growth of the diamagnetism under pressure comes about because a point of band degeneracy is approaching the Fermi level. The initial position of the band with respect to the Fermi level is refined, and its dependence on the atomic volume is determined.
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