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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2002, Volume 76, Issue 3, Pages 214–218
(Mi jetpl2888)
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This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
Phase transition in a vortice lattice in a Bi2212:Pb single crystal
L. S. Uspenskayaa, A. B. Kulakova, A. L. Rakhmanovb a Institute of Solid State Physics, Russian Academy of Sciences
b Institute for Theoretical and Applied Electromagnetics, Russian Academy of Sciences, Moscow
Abstract:
The magnetooptical method was used to investigate the penetration of a magnetic flux into a single crystal of a high-temperature superconductor ${\rm (Bi_{0.84}Pb_{0.16})_{2.2}Sr_{2}CaCu_{2}O_{8}}$ in crossed magnetic fields. It is shown that at low temperatures the penetration of the magnetic flux is anisotropic: the flux moves preferentially along the magnetic field applied in the plane of the sample, and the anisotropy grows as the temperature increases. At a temperature $T_m=54\pm2\,$K, there occurs a sharp change in the character of penetration of the magnetic field into the superconductor; the direction of the flux ceases be dependent on the direction and magnitude of the magnetic field applied in the plane of the sample. In this case, the transition temperature $T_m$ is independent of the applied magnetic field. The effect is interpreted in terms of the concepts of a phase transition in the system of vortices, which is related to a sharp decrease in the correlations in the position of vortices in various CuO planes, i.e., with the transition from three-dimensional to two-dimensional behavior of the vortex structure.
Received: 10.07.2002
Citation:
L. S. Uspenskaya, A. B. Kulakov, A. L. Rakhmanov, “Phase transition in a vortice lattice in a Bi2212:Pb single crystal”, Pis'ma v Zh. Èksper. Teoret. Fiz., 76:3 (2002), 214–218; JETP Letters, 76:3 (2002), 180–184
Linking options:
https://www.mathnet.ru/eng/jetpl2888 https://www.mathnet.ru/eng/jetpl/v76/i3/p214
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