Preisach approach to the magnetic properties of itinerant ferromagnet SrRuO3

Zero field cooled (ZFC) and field cooled (FC) magnetization as a function of temperature of itinerant ferromagnet SrRuO3 has been measured experimentally, in a sequence of applied fields up to the coercive field, and also the major hysteresis loop at a sequence of temperatures which span the ordered phase. The data have been analysed within the framework of a generalized version of the Preisach model of hysteresis, which combines thermal fluctuations with the change of the free energy barriers below Tc. The numerical simulations replicate all of the principal structural systematics of the data, and yield details of the spectrum of Barhausen instabilities in this material.