ABHIJEET DAS, CV Raman Global University Bhubaneswar
Hendrik, Research Center for Metallurgy - National Research and Innovation Agency (BRIN), Kawasan Puspiptek, Tangerang Selatan 15314, Banten, Indonesia
Purwanto, Department of Mining Engineering, Hasanuddin University, Kampus Teknik UNHAS, Jl. Poros Malino KM.6, Bontomarannu, Gowa 92171, Sulawesi Selatan, Indonesia
Sufriadin, Department of Mining Engineering, Hasanuddin University, Kampus Teknik UNHAS, Jl. Poros Malino KM.6, Bontomarannu, Gowa 92171, Sulawesi Selatan, Indonesia
Yeni FEBRIANTI, Department of Physics, Universitas Indonesia, Depok, West Java, 16424, Indonesia, and PT Cipta Mikro Material, Kab. Bogor, West Java, 16340, Indonesia
ZULKARNAIN, Department of Physics, Universitas Indonesia, Depok, West Java, 16424, Indonesia