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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Thermodynamic observation of first-order vortex-lattice melting transition in Bi2Sr2CaCu2O8

Article Abstract:

The results of a study on Bi2Sr2CaCu2O8, a type II superconductor in a magnetic field, shows that the magnetic vortex filaments in a high-temperature superconducting compound melt according to a pattern that follows first-order phase transition. The results also showed that the vortex liquid expands upon freezing in the same way that water expands when transformed into ice. The study demonstrates that matter composed of flexible directed lines exhibits different behavior from assemblies of point-like molecules or atoms.

Author: Zeldov, E., Shtrikman, H., Majer, D., Konczykowski, M., Geshkenbein, V.B., Vinokur, V.M.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
Magnetic properties, Superconductors

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Possible coexistence of s- and d-wave condensates in copper oxide superconductors

Article Abstract:

Two different superconducting gaps having the same transition temperature and dissimilar symmetries exists in copper oxide superconductors. This fact is responsible for the s-wave character perpendicular to the CuO2 planes and d-wave character along the 'a' or 'b' axis of YBa2Cu3O(sub 7-delta) of the wavefunction of superconductor condensate. Based on these assumptions, it was possible to explain the in-plane tunneling between the Yttrium barium copper oxides films.

Author: Muller, K. Alex
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
Analysis, Tunneling (Physics), Yttrium barium copper oxides

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Some vortices like it hot

Article Abstract:

Research on copper-oxide superconductors and the Nernst effect is discussed. Compounds with copper-oxygen layers are superconductors at high temperatures and they are found to act differently to other superconductors.

Author: Lee, Patrick A.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000

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Subjects list: Research, High temperature superconductors, Copper oxide superconductors
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