1. Magnetic Materials Laboratory (LMM), Faculty of Exact Sciences Djillali Liabes University of Sidi Bel‐Abbes Sidi Bel‐Abbes Algeria
2. Department of Physics, Faculty of Exact Sciences and Informatics Hassiba Benbouali University of Chlef Chlef Algeria
3. Department of Exact Sciences Higher Teacher Training School of Bou Saada Bou Saada Algeria