About the Authors

Faiza Lourdjane

Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria

Azzeddine Abderrahmane Raho

Solids solutions laboratory, physics faculty USTHB, BP 32, El-Alia, Algiers, Algeria

Corresponding Author

Email: lourdjane_faiza@yahoo.fr; raho_azzeddine@yahoo.fr