Thermal fluctuation effects on the magnetization above and below the superconducting transition in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} and YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} crystals in the weak magnetic field limit
- Universidad de Santiago de Compostela (Spain); and others
The authors present detailed experimental data of the magnetization, M{sub ab}(T,H), of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} and YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} crystals on both sides of the superconducting transition, for magnetic fields, H, applied perpendicularly to the ab (CuO{sub 2}) planes. The data are analyzed in terms of thermal fluctuations in the weak H limit: In the reversible mixed state below the transition, by taking into account the vortex fluctuations, as first proposed by Bulaevskii, Ledvij and Kogan, which are much more important in the Bi-based compounds. Above the transition, by taking into account the order parameter amplitude fluctuations (OPF), through a generalization to multilayered superconductors of the Schmidt-like approach.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443633
- Report Number(s):
- CONF-960808-; ISSN 0022-2291; CNN: Grant MAT95-0279; TRN: 97:000865-0006
- Journal Information:
- Journal of Low Temperature Physics, Vol. 105, Issue 5-6; Conference: 3. international conference on physics and chemistry of molecular and oxide superconductors, Karlsruhe (Germany), 2-6 Aug 1996; Other Information: PBD: Dec 1996
- Country of Publication:
- United States
- Language:
- English
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