High-purity starting chemical powders of Y2O3 (99.99%), BaCO3 (99.98%) and CuO (99.99%) (Sigma–Aldrich Co. Ltd.) were used for the purpose of producing bulk ceramic Y3Ba5Cu8Oy sample and YBa2Cu3Ox sample (reference sample) by the standard Solid–State Reaction (SSR) method, which was preferred due to cheaper fabrication costs, shorter sintering or fabrication time, etc.