1. Department of Physics, Giant Dielectric and Computational Design Research Group (GD-CDR), Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
2. National Metal and Materials Technology Center, 114 Thailand Science Park, Paholyothin Road, Klong 1, Khlong Luang, Pathumthani 12120, Thailand
3. Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University, Khon Kaen 40002, Thailand