ausblenden:
Schlagwörter:
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Zusammenfassung:
Specific-heat measurements on a sample of YBa2Cu3O7 have been extended
over a wide enough temperature interval to permit the determination of
the entropies of both the zero-field ''upturn'' and the Schottky
anomalies that occur in applied fields greater than a few tesla. Within
the experimental uncertainty, these entropies are equal, consistent with
a model in which both features are associated with the same low
concentration of Cu2+ magnetic moments.