Vortex dynamics in a thin film of Tl{sub 2}Ba{sub 2}CuO{sub 6}

The vortex dynamics in a Tl{sub 2}Ba{sub 2}CuO{sub 6} (Tl-2201) thin film with a critical temperature {Tc} = 80.8 K has been studied by electrical resistivity measurements for magnetic fields 0 {le} B {le} 12 T. The vortex glass line, as determined from the disappearance of linear resistivity, was found to be well described by B{sub g}(T) = B{sub 0}[(1 {minus} T/{Tc})/(T/{Tc})]{sup {alpha}}, with B{sub 0} {approx} 0.65 T and {alpha} {approx} 1.9. The glass line of Tl-2201 is observed to be located below the one of Tl{sub 2}Ba{sub 2}CaCu{sub 2}P{sub 8{delta}} (Tl-2212) in a magnetic phase diagram based on a reduced temperature scale T/{Tc}, thus suggesting a higher anisotropy for Tl-2201.