1. Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
2. Theoretical Physics Research Group, Advanced Institute for Materials Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
3. Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
4. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
5. Department of Physical Chemistry, Plovdiv University “Paisii Hilendarski”, 24 Tzar Asen Str., 4000 Plovdiv, Bulgaria
6. Department of Materials Science and Engineering, Korea University, Seoul 136-713, South Korea
7. Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, Yongin 17035, South Korea
8. Physics Division, School of Science Education, Chungbuk National University, Cheongju 361-763, South Korea