Stabilization of mercury cuprates by thallium, superconductivity in Hg1-x Tlx Ba2 Can-1 Cun O2n+2+d

An intriguing way to stabilize the Hg-based cuprates is related to the partial substitution of mercury by foreign cations with higher valence. In this report, the substitution of mercury by foreign cations with higher valence. In this report the substitution of thallium for mercury has been studied. A series of superconducting Hg1-x Tlx Ba2 Can-1 Cun O2n+2+d (with n = 1, 2, 3 and 0 ≤ x ≤ 1) has been synthesized in sealed tubes. The characterization of these samples was made by using X-rays diffraction, SEM and electrical resistivity and magnetic susceptibility measurements. Their results show that the critical temperature Tc does not significantly vary by changing the ratio of Tl to Hg