Klymuk O. Thermo-magnetic effects in materials with resistive-magnetic phase transition of the 1-st order

The thesis offers the expression that describes temperature dependence of FMR spectrum that arises up in the isotropic magnetic of cylindrical shape with a magnetic phase transition of the 1st order when being placed in the perpendicular external magnetic field. A special attention has been paid to the vicinity of phase transition temperature. Also the model of realization of the thermostabilization mode is proposed for a plate made of material with a combined magnetic and resistive phase transition of the 1st order when being placed in both electrical and magnetic (either perpendicular or longitudinal) fields. The range of the field and temperature parameters of the system, at which the realization of proposed thermostabilization mode is possible, is determined. The thermostabilization mode proved to be more effective in the longitudinal magnetic field, when the temperature of the system can be maintaned within the limits of 1 К at fluctuations of the surrounding medium temperature within the limits of 100 К.