Equality of the entropies of the low-temperature zero-field upturn and the 
in-field Schottky anomalies in the specific heat of YBa2Cu3O7

Woodfield, B. F.; Fisher, R. A.; Phillips, N. E.; Caspary, R.; Hellmann, P.; Steglich, F.; Wolf, T.

doi:10.1016/0921-4534(94)90589-4

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Equality of the entropies of the low-temperature zero-field upturn and the in-field Schottky anomalies in the specific heat of YBa₂Cu₃O₇

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Citation

Woodfield, B. F., Fisher, R. A., Phillips, N. E., Caspary, R., Hellmann, P., Steglich, F., et al. (1994). Equality of the entropies of the low-temperature zero-field upturn and the in-field Schottky anomalies in the specific heat of YBa₂Cu₃O₇. Physica C, 234(3-4), 380-384. doi:10.1016/0921-4534(94)90589-4.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-E534-C

Abstract

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.