High-pressure synthesis of pure and doped superconducting MgB<sub>2</sub>compounds
High-pressure synthesis of pure and doped superconducting MgB<sub>2</sub>compounds
Superconducting properties of bulk, dense, pure MgB2 and doped (Mg1−xAx)B2 samples with A = Na, Ca, Cu, Ag, Zn and Al were studied for compositional ranges 0 < x ≤ 0.20. The effects on pinning properties and critical current were investigated, particularly for A = aluminium. The samples were sintered …