Relationship between critical temperature, oxygen deficiency and Meissner fraction in YBa2Cu3O7-δ superconductors
Description
The relationship between the oxygen deficiency δ and the critical temperature Tc in the YBCO system has been studied by many authors; most workers are in agreement that the region of superconductivity in YBCO starts at δ ≅ 0. Also, they leave unanswered questions. Why is δ nearly equal to 0 and not exactly equal to 0? What is the definite value of δ corresponding to the end of the superconductivity region? In this work a relationship between Meissner fraction and the grain diameter of the presintered powder is presented. A new function Ψδ2 (where Ψ is the Meissner fraction) is introduced. This function increases linearly with Tc. Also, it is found that the range of good superconductivity in YBCO starts at δ = 0.12 and ends at δ = 0.5. (author)
Additional details
Publishing Information
- Journal Title
- Superconductor Science and Technology (Online)
- Journal Volume
- 10
- Journal Issue
- 6
- Journal Page Range
- p. 403-408
- ISSN
- 1361-6668
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43111642
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM OXIDES; CERAMICS; CONCENTRATION RATIO; COPPER OXIDES; CUPRATES; HIGH-TC SUPERCONDUCTORS; MEISSNER-OCHSENFELD EFFECT; OXYGEN ADDITIONS; SUPERCONDUCTIVITY; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; DIMENSIONLESS NUMBERS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS; YTTRIUM COMPOUNDS
Optional Information
- Notes
- 17 refs; This record replaces 31040446