Abstract
Magnetization as a function of field parallel to the c axis shows an anomalous secondary peak for a single-crystal Tl2Ba2CuO6. The peak disappears above a crossover temperature Tcr, which is correlated with a crossover in the irreversibility line Hrev(T). For TTcr, Hrev(T)(1-T/Tc)n with n=3/2; for T<Tcr, Hrev(T) increases with 1/T exponentially, an indication of melting of two-dimensional (2D) vortices. Combined with magnetic-relaxation measurements at T<Tcr, we suggest the anomalous magnetization in this system is due to dimensional crossover from 3D to 2D vortex structure.
Original language | English (US) |
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Pages (from-to) | R755-R758 |
Journal | Physical Review B |
Volume | 52 |
Issue number | 2 |
DOIs | |
State | Published - 1995 |
ASJC Scopus subject areas
- Condensed Matter Physics