Effect of Li doping on structure and superconducting transition temperature of Mg1-xLixB2
Abstract We report the preparation of Mg 1− x Li x B 2 compounds. Nearly single phase samples were obtained for x ⩽0.3. The in-plane lattice parameter a decreases with Li doping, while the lattice parameter c does not show obvious change. The superconducting transition temperature of Mg 1− x Li x B 2 decreases with Li doping and loss of superconductivity occurs for x =0.5 sample. The results were discussed in terms of the T c dependence on hole doping and contraction of the lattice parameter a .