We report the synthesis under pressure, the critical temperature and the structural characteristics of YSr2Cu3Ow. The compound does not form at normal pressure, but, once formed, can be retained at normal pressure in a metastable state. The synthesis was carried out in a multi-anvil apparatus at 30 kBars and 1050°C. The as-prepared sample was found to become superconductor with a Tc of ≈ 63K. Tc increased up to ≈ 70 K after annealing in oxygen at 290°C. The refinement of the neutron diffraction data indicated that the as prepared YSr2Cu3Ow is tetragonal (a=3.7855 Å and c=11.386 Å) and the oxygen content, w, is ≈ 6.84.
Materials by design for sustainable solutions in the energy, medical, transport, and engineering sectors
