The magnetic susceptibilities of cerium and lanthanum metals have been measured from room temperature through the melting point. Cerium has a unique fusion behavior with a negative melting slope which has been attributed to a 4f-5d electronic promotion. It is demonstrated that this promotion in cerium does not occur and that the small change in the susceptibility at cerium's two high-temperature phase transformations can be attributed almost entirely to changes in the Pauli susceptibility. A quantitative estimate of this change is found by comparison with the lanthanum high-temperature susceptibility.
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Burr et al. (1966) studied this question.
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