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The Physics of Composite Superconductors

ISBN:
1-56700-066-5 (Imprimir)

The Physics of Composite Superconductors

Descripción

Composite superconductors offer the solution to a wide range of problems, the principal of which are: thermomagnetic instability, instability of the superconducting state with respect to strong pulsed perturbations, heat release under varying external conditions, and inadequate strength and plasticity. The macroscopic properties of composite superconductors, and the processes that occur in them, are studied in the rapidly developing subject of the physics of composite superconductors. This monograph presents a unified account of the subject and covers all important aspects of composite superconductors, such as structure and physical characteristics, losses, stability of the critical state, superconducting to normal transition, and high-temperature superconductivity.



348 pages, © 1997

Tabla de Contenidos:

Introduction
1. HARD SUPERCONDUCTORS
1.1 Viscous flow of magnetic flux; pinning
1.2 Critical state of hard superconductors
1.3 Resistive state of hard superconductors
2. STRUCTURE AND PHYSICAL CHARACTERISTICS OF COMPOSITE SUPERCONDUCTORS
2.1 Composite superconductors
2.2 Physical properties of the elements of composite superconductors
2.3 Physical properties of superconducting composites
3. LOSSES IN SUPERCONDUCTORS
3.1 Qualitative theory
3.2 Hysteretic loss
3.3 Losses in composite superconductors (a << R)
3.4 Losses in composite superconductors (a ∼ R)
3.5 Losses in composite superconductors carrying a transport current
3.6 Losses in in situ formed composite superconductors
4. STABILITY OF THE CRITICAL STATE
4.1 Qualitative theory of magnetic flux jumping
4.2 Hard superconductors (τ << 1)
4.3 Composite superconductors (τ >> l)
4.4 Limited magnetic flux jumping in hard superconductors
4.5 Current-carrying capacity of composite superconductors
4.6 Thermochemical plastic flow instability in composite superconductors
4.7 Thermomagnetomechanical instablity and the training of superconductors
5. SUPERCONDUCTING TO NORMAL TRANSITION
5.1. Heat equilibrium in current-carrying superconductors
5.2. Propagation of the boundary between normal and superconducting states
5.3. Resistive domains
5.4. Superconducting to normal transition initiated by a thermal pulse
5.5. Localization of normal phase in inhomogeneous superconductors
5.6. Dynamic phenomena in superconductors containing the resistive phase
5.7. Superconducting to normal transition in composite superconductors wih high contact resistance
6. HIGH-TEMPERATURE SUPERCONDUCTIVITY
6.1. High-temperature superconductors
6.2. Physical properties of the elements of composite superconductors at liquid nitrogen temperatures
6.3. Stability of the superconducting state of high-temperature superconductors
6.4. Superconducting to normal transition in the presence of a transport current
REFERENCES
INDEX