The Fermi surface of CeP was investigated by means of the de Haas-van Alphen (dHvA) effect. In addition to the branch observed in the Schubnikov-de Haas effect with a frequency of 190 T, a new one with a rather large frequency was discovered. From a comparison with CeSb, the angular dependence of the 190 T branch suggests that it arises from the ellipsoidal electron pocket. It is this branch which corresponds to the period of anomalous multi-step magnetization driven by Landau level crossing.
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