Superconductivity at 155 K

Journal Article · Mon Jun 15 04:00:00 EDT 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.58.2579· OSTI ID:6370277

Ovshinsky, S R; Young, R T; Allred, D D; DeMaggio, G; Van der Leeden, G A

Transition to a superconducting zero-resistance state at 155 K is observed for the first time in bulk material. A new five-element compound has been synthesized with nominal composition Y/sub 1/Ba/sub 2/Cu/sub 3/F/sub 2/O/sub y/. Fluorine plays a critical role in achieving this effect. X-ray diffraction and electron microprobe analysis indicate that the samples are multiphasic. Evidence is presented that the samples contain superconducting phases with onset temperatures considerably above 155 K. Magnetic measurements suggest a flux-trapping effect below 260 K, and diamagnetic deviations from Curie-Weiss behavior in the range 250 Kless than or equal toTless than or equal to100 K indicate a Meissner effect in a small superconducting volume fraction.

• Research Organization: Energy Conversion Devices, Inc., Troy, Michigan 48084
• OSTI ID: 6370277
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 58:24; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHARGED PARTICLES
COHERENT SCATTERING
COPPER COMPOUNDS
CURIE-WEISS LAW
DATA
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
FLUORINE COMPOUNDS
FLUORINE IONS
HALOGEN COMPOUNDS
INFORMATION
IONS
LOW TEMPERATURE
MAGNETIC PROPERTIES
MICROSCOPY
NUMERICAL DATA
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SUPERCONDUCTIVITY
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS