Magnetization steps near the irreversibility line in a mercury-based superconducting cuprate
V. Hardy, A. Daignère, A. Maignan
DOI 10.1103/PhysRevB.61.3610 · Physical Review B
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Abstract
Steps in the equilibrium magnetization curves of a (Hg0.8Cu0.2)Ba2CuO4+δ (Hg-1201) single crystal have been detected in bulk magnetic measurements. The associated transition line in the H−T plane can be reasonably accounted for by melting or decoupling models, both leading to nearly the same value of the anisotropy parameter. The entropy changes along this line have been inferred from the height of the magnetization steps by assuming the underlying transition to be of first order. The order of magnitude of this entropy change, as well as its field and temperature dependences, is discussed in comparison to the available literature on other high-Tc superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (Hg0.8Cu0.2)Ba2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| (Hg0.8Cu0.2)Ba2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 95 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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