1. Department of Materials Physics Eötvös Loránd University Pázmány Péter sétány 1/A. Budapest H-1117 Hungary
2. Department of Physics Faculty of Science Tanta University 31527 Tanta Egypt
3. Institute of Physics of Advanced Materials Ufa State Aviation Technical University 12 K. Marx street Ufa 450008 Russia
4. Laboratory of Mechanics of Advanced Bulk Nanomaterials Saint Petersburg State University Universitetskiy prospekt 28, Peterhof St. Petersburg 198504 Russia