1. Department of Materials Science and Engineering, Hanbat National University, Daejeon 34158, South Korea
2. Fakultas Teknologi Pertahanan, Universitas Pertahanan Indonesia, Bogor 16810, Indonesia
3. Center for Scientific Instrumentation, Korea Basic Science Institute, Daejeon 34133, South Korea
4. Department of Physics, Chungbuk National University, Cheongju 28644, South Korea