We have synthesized CaBaLaCu3O7−δ and related compounds Ca0.9BaLaCu3O7−δ, Ca11 BaLaCu3O7−δ and Ca0.9Ce0.1 BaLaCu3O7−δ in order to investigate the effect of doping and non-stoichiometry at Ca-sites on the superconducting behaviour of tetragonal superconductor CaBaLaCu3O7−δ. The superconducting transition temperature (Tc) of Ca0.9 BaLaCu3O7−δ is the same as that of pure CaBaLaCu3O7−δ(67 ± 1 K). Calcium excess compound Ca1.1 BaLaCu3O7−δ showed a drop inTc to 72 K while the cerium-substituted compound Ca0.9 Ce0.1 BaLaCu3 O7−δ showed a drop inTc to 43 K. The results are explained on the basis of difference in valency between the host and the dopant ion.
Volume 43, 2020
Continuous Article Publishing mode
Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020
Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020
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