Magnetic Properties of the Nano Brownmillerite KBiFe2O5: Monte Carlo Simulations

Abstract

In this paper, we have used the Monte Carlo simulations (MCSs) to investigate the magnetic properties of the brownmillerite KBiFe2O5 (KBFO) compound. The different exchange coupling interactions [Formula: see text], [Formula: see text] and [Formula: see text] between different irons Fe atom have been outlined including the angles between Fe1-O-Fe2. The double exchange interaction is caused by the existence of the oxygen atoms. In a first step, we present the ground state phase diagrams in the absence of any temperature fluctuations, in different physical parameter planes. Then we present investigation of the magnetic properties and the behavior of the total magnetizations, the total susceptibilities, as a function of temperature, crystal field, the exchange coupling interactions and the external magnetic field. Also, we provide the dependency of the total magnetizations showing the hysteresis loops of the KBFO compound, for selected values of temperature, crystal field and the exchange coupling interactions.