1. Scientific–Practical Materials Research Centre of the NAS of Belarus P. Brovka St. 19 Minsk 220072 Belarus
2. National University of Science and Technology MISiS Moscow 119049 Russia
3. Department of PhysicsChungbuk National University 1 Chungdaero, Seowongu Cheongju 28644 South Korea
4. Department of Nuclear ResearchCenter for Physical Sciences and Technology Savanorių Ave. 231 Vilnius LT–02300 Lithuania
5. Institute of Materials Science of Kaunas University of Technology Baršausko St. 59 Kaunas LT–51423 Lithuania
6. Departamento de Física and I3NUniversidade de Aveiro Aveiro 3810–193 Portugal