Splitting of the second magnetization peak in the superconductor Tl2Ba2CaCu2O8+x
M. Pissas, D. Stamopoulos, V. Psycharis, Y. C. Ma, N. L. Wang
DOI 10.1103/PhysRevB.73.174524 · Physical Review B
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Abstract
The vortex-matter phase diagram of Tl2Ba2CaCu2O8+x single crystal superconductor has been studied, using bulk and local magnetization measurements. We observed a second magnetization peak in the temperature interval 20K<T<40K. At 40K the second peak splits into two peaks, termed the upper and lower second magnetization peaks (USP and LSP), respectively. In the magnetic field interval [HLCP,HUCP] we observed the clear signature of a first-order melting transition of the vortex lattice. This particular behavior is similar to a situation with two critical endpoints of the first-order melting line and one coexistence point, where the topological transition line ends on the first-order melting line.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CaCu2O8+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 110 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| HgBa2CuO4+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2-xSrxCuO4 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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