Thermomagnetic instability of metal-insulator phase boundary

Summary form only given, as follows. We consider a diffusion of a magnetic field into a substance, which undergoes a metal-insulator phase transition under Joule heating. A development of a thermomagnetic instability of the phase boundary is studied analytically and numerically in detail. A solid solution (V/sub 1-x/Cr/sub x/)/sub 2/O/sub 3/ is taken as a model substance. In the non-linear stage the instability development shows a universal behavior which is independent on a shape of the initial disturbance.