Title :
Theoretical Model of Temperature Dependence of Hysteresis Based on Mean Field Theory
Author :
Raghunathan, A. ; Melikhov, Y. ; Snyder, J.E. ; Jiles, D.C.
Author_Institution :
Wolfson Centre for Magnetics, Cardiff Univ., Cardiff, UK
fDate :
6/1/2010 12:00:00 AM
Abstract :
The magnetization processes in ferromagnetic materials are dependent on temperature. In order to understand thoroughly the behavior of magnetization processes in ferromagnetic materials at different temperatures, a temperature dependent hysteresis model is necessary. In the present study, a physical model based on Jiles-Atherton (JA) theory was developed to study the effects of temperature on magnetic hysteresis. This was achieved through the introduction of temperature dependent hysteresis parameters of the existing model. The material dependent parameters such as Curie temperature and critical exponent have also been added as additional variables to the existing model. The temperature dependent extension of the JA model was validated against measurements made on cation substituted cobalt ferrite material and the results show good agreement between theory and experiment.
Keywords :
Curie temperature; cobalt compounds; critical exponents; crystal field interactions; ferromagnetic materials; magnetic hysteresis; Curie temperature; Jiles-Atherton theory; cation substituted cobalt ferrite material; critical exponent; ferromagnetic materials; hysteresis model; magnetic hysteresis; magnetization processes; mean field theory; temperature dependence; temperature dependent hysteresis parameters; Cobalt; Equations; Ferrites; Magnetic anisotropy; Magnetic domain walls; Magnetic hysteresis; Magnetic materials; Magnetization processes; Perpendicular magnetic anisotropy; Temperature dependence; Jiles–Atherton (JA) model; magnetic hysteresis; magnetization processes; modeling; temperature;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2045351
