High pressure crystal growth of Y2Ba4Cu6+nO14+n and HgBa2Can$minus;1CunO2n+2+$delta; superconductors

Abstract An overview is presented of the phase diagram and crystal growth investigations of Y 2 Ba 4 Cu 6+ n O 14+ n and HgBa 2 Ca n −1 Cu n O 2 n +2+δ compounds synthesized at high pressure.