Effect of Relative Substitution of Nanomaterials (Pb, Mg) on the Structural and Electrical Properties of the Superconductor Compound Bi₂₋ₓPbₓBa₂₋ᵧMgᵧCa₂Cu₃O₁₀₋δ. J.P.A.S. 2026;26(4). doi:10.70882/d1n5y221