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Study of the Thermodynamic Parameters of HgBa2Ca2Cu3O8-x, by Using Hao and Clem's Model

並列摘要


Magnetization M(T) of grain-aligned HgBa2Ca2Cu3O8-x high-T, superconductor was measured for external magnetic fields parallel to the c-axis. The magnetization is field independent at T^* = 128 K, which indicates a dominant vortex fluctuation. Except for this vortex fluctuation region, reversible magnetization could be described by using the Hao and Clem's model, and this model was used to extract thermodynamic critical field H,(T) = 5877 Oe and Ginzburg-Landau parameter K = 118. We also obtained such superconducting parameters such as the penetration depth λab(0) = 2060A, coherence length ζab(0) = 18A, and upper critical field Hc2(0) = 108 T.

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