Fluctuations of vortices in layered high-Tc superconductors

L. N. Bulaevskii; M. Ledvij; V. G. Kogan

doi:10.1103/PhysRevLett.68.3773

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Fluctuations of vortices in layered high-Tc superconductors

L. N. Bulaevskii, M. Ledvij, V. G. Kogan

DOI 10.1103/PhysRevLett.68.3773 · Physical Review Letters

T1

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Abstract

The temperature Ts of spontaneous creation of vortex lines in Josephson coupled layered superconductors is obtained by taking into account the entropy contribution to the free energy due to thermal distortions. For Bi- and Ti-based high-Tc superconductors and superlattices, the superconducting critical temperature Ts lies noticeably below the mean-field transition temperature Tc0(Tc0-Ts≊4 K or more). The contribution of thermal distortions to the free enery causes significant changes in the temperature and field dependences of magnetization below Ts seen in Bi compounds.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	95	Pressure not reported	unknown
Bi2Sr2Ca2Cu3O10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	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