Incongruent melting of the high temperature superconductor YBa/sub 2/Cu/sub 3/O/sub 7/

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6696985

McCallum, R W; Noack, M A; Verhoeven, J D; Gibson, E D; Ku, H C

A study has been made of the melting of the high temperature superconductor YBa/sub 2/Cu/sub 3/O/sub 7/. The material was found to melt at 980/degree/C in an atmosphere of argon 20% oxygen. In a commercial oxygen atmosphere the melting temperature was found to increase by approximately 20/degree/C. Above the melting point the material consisted of a molten phase of BaCuO/sub 2/-Cu/sub 2/O-CuO and solid Y/sub 2/BaCuO/sub 7/. Subsequent heat treating at 940/degree/C restores the superconducting phase. 5 refs., 2 figs.

• Research Organization: Ames Lab., IA (USA)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6696985
• Report Number(s): IS-M-608; CONF-870873-31; ON: DE89003734
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHALCOGENIDES
COHERENT SCATTERING
CRITICAL TEMPERATURE
DIFFRACTION
MELTING
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SCATTERING
SUPERCONDUCTORS
THERMAL ANALYSIS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES