Faculty of Information Science and Electrical Engineering, Kyushu University
Abstract
Composite superconductor with contact electrical resistance between a superconductor proper and a matrix of normal metal is considered as a distributed trigger system described by two coupled diffusion-reaction equations. Analytical expression for the minimum normal zone propagation current in the composite superconductor is derived for the case of a small contact electrical resistance, and the general diagram of resistive states in the coordinates of transport current versus contact resistance is obtained numerically. Comparison of the diagrams for the composite superconductor and a distributed trigger system described by modified FitzhewNagumo type equations is also made. On the diagrams of both systems, regions of stable domains, switching waves propagation and self-organization of domain structures are indicated
