Evidence of strong anisotropic behavior in the five-layered superconductor HgBa2Ca4Cu5O12+y from equilibrium magnetization measurements
Min-Seok Park, Jung-Dae Kim, Kyung-Hee Kim, Yong-Tae Kwon, Young Cheol Kim, Akira Iyo, Kazuyasu Tokiwa, Sung-Ik Lee
DOI 10.1103/PhysRevB.77.024519 · Physical Review B
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Abstract
The equilibrium magnetization of grain-aligned HgBa2Ca4Cu5O12+y (Hg1245) with Tc≃108K was measured. The Ginzburg-Landau parameter (κ), obtained by using the Hao-Clem model, increased unphysically with increasing temperature for T∕Tc⩾0.7, which indicates that the fluctuation is greatly enhanced. The two-dimensional scaling behavior of the magnetization and the temperature variation of the irreversibility field Hirr(T) from a power-law behavior at low fields to an exponential behavior at high fields indicate that Hg1245 is highly anisotropic, which seems to be affected by the appearance of antiferromagnetism at the inner CuO2 planes while blocking the coupling of the superconductivity between the outer CuO2 layers.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HgBa2Ca4Cu5O12+y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 108 | Pressure not reported | unknown |
| HgBa2Ca3Cu4O10+y 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 |
| YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | 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 |
| Sr0.9La0.1CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba2Ca2Cu3O6(O,F)2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Tl2Ba2CaCu2O8 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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