Normal and mixed state Hall effect in (Hg 0.9Re 0.1)Ba 2CaCu 2O 6+ δ fully textured HTSC thin films

Abstract

Temperature and magnetic field dependence of the Hall effect in the normal and mixed state of fully textured (Hg 0.9Re 0.1)Ba 2CaCu 2O 6+ δ (HgRe-1212) HTSC thin films prepared by laser ablation deposition have been studied. The longitudinal resistivity ρ xx and Hall resistivity ρ yx of HgRe-1212 superconductor thin films were measured for a wide range of magnetic fields from 125 mT to 12 T with the field perpendicular to the ab plane and the current in the ab plane. A sign change of the Hall resistivity is observed in fields below 3 T in the region close to the superconducting onset temperature. The temperature dependencies ρ xx ∝ T and ρ yx ∝ 1/ T have been observed for HgRe-1212 thin films. The Hall angle θ H relation cot θ H = αT 2 + β, remains valid for temperatures T between T c and 200 K. In the mixed state a power-law behavior is observed, where ρ yx scales to a power-law function of ρ xx : ρ yx = A ρ xx β , with β increasing from 1.0 to 1.7 as the field increases from 1 to 12 T.