MAGNETIC SUBLATTICES INDUCED BY CATION VACANCIES(FOR EXAMPLE FERRIMAGNETIC PYRRHOTITE)
Based on analysis of s-d exchange interaction in structures of NiAs with partially vacant cation positions, simulate various kinds depending on the temperature of the resultant magnetization nonstoichiometric ferrimagnetics. Based on research methods NGR pyrrhotite and XRD proved that the two-sublattice ferrimagnetic containing cation vacancies in the structure, should be treated with a certain type of distribution of vacancies, how ferrimagnetic with four magnetic sublattices. In this case, the additional magnetic sublattices can be considered as sublattices induced by the nature of the distribution of cation vacancies in the structure. Quantum – mechanical calculations in the model of the molecular-field magnetization temperature changes separately for each of the sublattices, and analysis of the resulting thermal magnetization curve, explain a number of experimentally obtained magnetization curves of temperature nonstoichiometric pyrrhotite with different density vacancies in the structure.