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YBCO
- Introduction
- Structural Properties of Y-123, Y-124 and Y-247
- Thermal Properties
- Mechanical Properties of RE123
- Thermal Expansion Coefficient
- Elastic Modulus
- Fracture Toughness
- Fracture Strength
- Plastic Deformation
- Chemical Properties
- Phase Diagrams for YBCO Materials
- Temperature/Pressure/Composition Phase Behaviour
- Phase Diagram for Y-123 Materials Versus Oxygen: Chemical Compatibility
- Optical Properties
- Normal-State Properties
- Superconducting Properties
- Fundamental Superconducting Parameters
- Pinning Energies
- Hysteresis Curves, J c Versus Field and Temperature
- Irreversibility Data
- Grain Boundaries in YBCO
- Microstructure and Pinning
- Radiation Effects and Pinning
- Summary
- References
Abstract
Probably the most extensively studied high-temperature superconductor (HTS) is YBa2Cu3O7-x, abbreviated YBCO or just Y-123 (T c = 93 K). This compound was discovered in early 1987 by Wu et al [1] and is the first compound found for which T c exceeded the boiling point of liquid nitrogen (77 K at 1 atm). It seems fitting that this material exhibits one of the most interesting and complex relationships between chemistry, crystal structure and physical properties of any ceramic material ever studied.
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