Abstract
The stability of the nonisothermal state of a layered superconductor carrying a current is investigated in a model based on the heat production in an electrical circuit with nonlinear resistance, which adequately reflects the features of the quasi-two-dimensional behavior of the system. The state diagrams of the layered superconductor are plotted in the following coordinates: heat removal coefficient (which depends on the substrate properties) versus current, and nonlinearity parameter (which characterizes the superconductor material) versus current. The velocity of the resistive-zone motion as a function of the value of the transport current is calculated for different values of the nonlinearity parameter.
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