1. Carnegie Laboratory of Physics, SUPA, School of Science and Engineering, University of Dundee, Dundee DD1 4HN, United Kingdom
2. Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt
3. Ural Federal University, Ekaterinburg 620002, Russia
4. Institute of Solid State Chemistry, Russian Academy of Sciences, Ekaterinburg 620990, Russia