Oxygen-loss effects on superconductivity of Bi2Sr2CaCu2Oy system
Creators
- 1. Steel Research Center, NKK Corporation, Kawasaki 210, Japan (Japan)
- 2. Research Institute of Electronics, Shizuoka University, Hamamatsu 432, Japan (Japan)
- 3. College of Engineering, Shizuoka University, Hamamatsu 432, Japan (Japan)
- 4. Institute for Materials Research, Tohoku University, Sendai 980, Japan (Japan)
Description
The properties of Bi2Sr2CaCu2Oy annealed at 200--650 degree C in vacuum (10-4Pa) are studied by x-ray powder diffraction, ac magnetization, and Hall measurement. The amount of oxygen loss, Δy, was obtained by an integration of the oxygen partial pressure measured by a quadrupole mass spectrometer. The Tc increases from 65 to 92 K, which is accompanied by a small amount of oxygen loss (on the order of 10-3). The a and c axes are extended by the oxygen loss. The change of the hole concentration estimated by Hall measurement is of the same order of magnitude as that for the other superconducting oxides against the change of Tc, however, it is larger by about two orders of magnitude than that expected from the oxygen loss. This discrepancy suggests charge redistribution in the structure
Additional details
Publishing Information
- Journal Title
- Physical Review, B: Condensed Matter
- Journal Volume
- 43
- Journal Issue
- 13
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 10445-10450
- ISSN
- 0163-1829
- CODEN
- PRBMD
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22076211
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANNEALING; BISMUTH OXIDES; CALCIUM OXIDES; COPPER OXIDES; DESORPTION; EMANATION METHOD; HIGH TEMPERATURE; OXYGEN; STOICHIOMETRY; STRONTIUM OXIDES; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; HEAT TREATMENTS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS