Hysteresis Loops, Dynamical Systems and Magneto-Optics

Author(s)

Biscaia Tufaile, Adriana Pedrosa ; Tufaile, Alberto

• Document type: Journal article
• Source: 13TH CHAOTIC MODELING AND SIMULATION INTERNATIONAL CONFERENCE, CHAOS 2020; v. N/A, p. 13-pg., 2021-01-01.

Abstract

The interest in hysteresis and magnetism is shared by scientists with an impressive variety of backgrounds, such as mechanics, thermodynamics, electromagnetism, catastrophe theory, mathematics and dynamical systems, because hysteresis loop is a concept at the core of non-linear systems in which the dependence of the evolution of the states of these systems are related with their history. In this work we present a connection between dynamical systems and hysteresis loops and after that, we present some interesting hysteresis loops obtained using the Transverse MagnetoOptical Kerr effect (TMOKE), of thin films of sperimagnetic amorphous alloys with rare-earth and transition metal. The samples present first and second order transitions. The first order transition occurs at the compensation temperature when the total magnetic moment or magnetization is minimal. The second one occurs at the transition magnetic field when the behavior of the derivative of the signal changes, and it can be spin-reorientation or spin-inversion. (AU)