MODELING THE IRREVERSIBLE RESPONSE OF La_0.7Sr_0.3MnO₃ BASED ONPREISACH MODEL

The lumpish polycrystalline La_0.7Sr_0.3MnO₃ samples were fabricated by sol-gel method.The temperature dependence of the field cooled moment,the zero field cooled moment,the thermoremanent moment,and the isothermal remanent moment were collected in a fixed external field by SQUID.The numerical simulations clearly replicate all of the experimental data using the same parameters based on the Preisach model.The distribution of the dissipation field is obtained.