The Hysteresis and Magnetic Properties of a Nanoparticle with Disordered Interface

The hysteresis and the magnetic properties of a spherical ferrimagnetic nanoparticle with disordered interface are studied within the framework of Monte Carlo simulation. We investigate the effects of the Hamiltonian parameters on the physical properties of the system, namely, the hysteresis curves and the compensation behavior that is of crucial importance for technological applications such as thermo-optical recording. It has been found that all the compensation temperature curves emerge from a critical concentration parameter pc\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_c$$\end{document} at T=0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T=0$$\end{document}. It has been also found that for appropriate values of the system parameters, three compensation points can appear. Moreover, single, double and triple hysteresis loops which exhibit various shapes are observed.