Single crystal growth of YBa2Cu3O7-d through a Pt compound intermediate phase

L. MORALES, G.POLLA, D.VEGA, H.LANZA, P.LEVY, G.LEYVA.

SOLID STATE IONICS

ELSEVIER SCIENCE BV

Lugar: New York; Año: 1999 vol. 116 p. 139 - 143

0167-2738

Abstract We report the synthesis of YBa2Cu3O7−δ (Y-123 phase)-single crystals, through a different path to the traditional one – which involves Y2BaCuO5 (Y-211 phase) as a precursor –. In our case, at 970°C a Pt compound appears: Y2Ba3Cu2PtO10 which dissolves in the melt when heated at 1100°C allowing the growth of Y-123 phase. Large single crystals of Y-123 phase obtained through the route developed in this study showed good superconducting properties with a transition temperature onset at about 85 K; this transition temperature is shifted towards higher temperatures through oxygenation processes that are favoured by their dimensions. Author Keywords: YBa2Cu3O7−δ; Single crystal growth; Superconductor precursors PACS classification codes: 74.72.Bk; 74.72.Bf