Computational modeling of magnetic hysteresis with thermal effects
| Type of publication: | Misc |
| Citation: | |
| Year: | 2016 |
| Abstract: | We study computational behavior of a mesoscopic model describing temperature/external magnetic eld-driven evolution of magnetization. Due to nonconvex anisotropy energy describing magnetic proper- ties of a body, magnetization can develop fast spatial oscillations creating complicated microstructures. These microstructures are encoded in Young measures, their rst moments then identify macroscopic magnetization. Our model assumes that changes of magnetization can contribute to dissipation and, consequently, to variations of the body temperature a ecting the length of magnetization vectors. In the ferromagnetic state, minima of the anisotropic energy density depend on temperature and they tend to zero as we approach the so-called Curie temperature. This brings the specimen to a paramagnetic state. Such a thermo-magnetic model is fully discretized and tested on two-dimensional examples. Computa- tional results qualitatively agree with experimental observations. The own MATLAB code used in our simulations is available for download. |
| Preprint project: | NCMM |
| Preprint year: | 2016 |
| Preprint number: | 10 |
| Preprint ID: | NCMM/2016/10 |
| Keywords: | dissipative processes, hysteresis, micromagnetics, numerical solution, Young measures |
| Authors | |
| Added by: | [JP] |
| Total mark: | 0 |
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