Lock-in transition in good quality over-doped Tl2Ba2CuO6 crystals has been investigated. As the c-axis angle θ with the magnetic field H approaches 90°, the flux flow resistivity ρ(θ) exhibits a sharp drop, a dip and a peak. These features were observed for a particular range of H and temperatures T and they have been assigned to the vortex phase transitions of different types. These enabled us to identify the associated vortex phase diagrams, viz. the θ-t and θ-H phase diagrams, where t is the reduced temperature T/Tc We made an attempt to fit the data with the available theories and to discuss the results.
- Cu-O planes
- Flux flow
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering