Abstract
We have developed a new algorithm which enables a fast and exact evaluation of the dipolar interaction field for lattice systems of magnetic moments when periodic boundary conditions should be applied. The method uses the combination of (i) the fast Fourier transformation technique for the dipolar field evaluation and (ii) the modified version of the Ewald method known from the calculations of the Coulomb lattice sums. The algorithm enabled us to perform large-scale numerical simulations of the remagnetization processes in polycrystalline thin magnetic films with the random single-grain anisotropy and the intergrain exchange. The well known ripple-like structures forming during the remagnetization process were observed. The dependence of the ripple correlation lengths and the hysteresis loop parameters on the intergrain exchange coupling and the film thickness was studied.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
