Schottky anomaly in the heat capacity of the high-Tc superconductor YBa2Cu3O7
S. J. Collocott, R. Driver, L. Dale, S. X. Dou
DOI 10.1103/PhysRevB.37.7917 · Physical Review B
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Abstract
The heat capacity Cp of YBa2Cu3O7 has been measured from 1.4 to 6 K. Some samples exhibit a heat-capacity anomaly of the Schottky type while others show no anomaly. Chemical analysis of the samples by inductively coupled plasma atomic emission spectroscopy reveals the presence of heavy rare-earth-ion impurities, with the Schottky anomaly being attributed to the dysprosium ion. The source of the impurities is the Y2O3 starting material.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | zero_resistance |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | zero_resistance |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 94 | Pressure not reported | unknown |
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