Document Type : Research Paper
Authors
1 Materials Research School, ( NSTI) , Karaj, I. R. Iran
2 Physics Group, Islamic Azad University, Takestan branch, Takestan, I. R. Iran
3 Materials Research School, ( NSTI) , Karaj, I. R. Iran Yerevan State University, Yerevan, Armenia
4 Yerevan State University, Yerevan, Armenia
Abstract
Keywords