Practically impurity-free ceramic superconductors of La1.85Sr0.15Cu1-yZnyO4 with 0.00 ≤ y ≤ 0.30 were synthesized. The structure of these Zn-doped samples was characterized by X-ray diffraction studies. Rietveld refinements show that there is a tetragonal-to-orthorhombic phase transition which occurs at about y = 0.15. The bond length between the two apical oxygen atoms in the CuO6 octahedra for the Zn-doped samples decreases with increasing content of Zn in the tetragonal region, and the tilt angle of the CuO6 octahedra increases with the content of Zn in the orthorhombic region. The metal-insulator transition is also observed in this Zn-doped systems.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering