Physics – Condensed Matter – Superconductivity
Scientific paper
2001-10-02
Physics
Condensed Matter
Superconductivity
10 Pages, RevTex, 2 Postscript figures
Scientific paper
Using the high-sensitive mechanical method of measuring the dissipation processes in superconductors, the 3D-2D phase transition in magnetic field was investigated in the vortex lattice of strongly anisotropic high-temperature superconductors of Bi(2223) system. It was shown that with the increase of external magnetic field the dissipation connected with a motion of vortexes relative to the crystal lattice of a sample, first increases, reaching the maximum and then with a further increase of the magnetic field sharply reduces as a result of pinning enhancement in connection with the transition of three-dimensional vortex system in quasi-two-dimensional "pancake" one.
Chigvinadze J. G.
Iashvili A. A.
Machaidze T. V.
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