Physics Department;
Faculty of Women for Arts;
Science and Education;
Ain Shams University;
Cairo;
Egypt;
Solid State Physics Department;
Physics Research Division;
National Research Centre;
Dokki;
Giza;
Egypt;
Laboratory of Condensed Matter Physics (LPMC);
University of Picardie Jules Verne;
Amiens;
France;
Sol-Gel; Nano-Structure BaTiSnO3-Doped; “Er3+ Ion” or “Er3+/Yb3+ Ion”; Dielectric Properties;