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Anisotropy of the mixed‐state resistance of Tl 2 Ba 2 CaCu 2 O 8 single crystals
Author(s) -
Weidinger A.,
Seng P.,
Tidecks R.,
Samwer K.,
Yu. Logvenov G.,
Kolesnikov N. N.
Publication year - 1997
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19975090302
Subject(s) - condensed matter physics , anisotropy , vortex , superconductivity , perpendicular , materials science , magnetic field , anomaly (physics) , josephson effect , physics , optics , geometry , mathematics , quantum mechanics , thermodynamics
The electrical resistance of single crystals of the high‐temperature superconductor Tl 2 Ba 2 CaCu 2 O 8 has been measured as a function of the angle θ between the direction of the magnetic field and the current‐carrying CuO 2 ‐planes. The resistance is maximal for θ = 90° ( B ⟂CuO 2 ‐planes) and decreases to a minimum at θ = 0°. For small angles an anomalous enhancement of the resistance is found. While the general shape of the resistance is generated by the motion of “pancake vortices” in the CuO 2 ‐planes, the anomaly is due to “Josephson vortices” moving perpendicular to the planes.