This thesis is devoted to the theoretical modeling of skyrmionic devices, with a focus on optimizing the transport of skyrmions under realistic conditions without compromising simulation performance. Three different theoretical frameworks are used: the first two are the well-known micromagnetic model and the Thiele equation, and the third one is the Fokker-Planck equation of a skyrmion that is developed in this thesis. The main contributions of this thesis are: (i) a new set of numerical meshes that can optimize micromagnetic simulations in some scenarios, (ii) the design of the skyrmionic rails, a skyrmionic device that speeds-up skyrmions by an order of magnitude, (iii) the development of a deterministic, yet probabilistic, approach to model the dynamics of skyrmions at room temperature that outperforms the other theoretical models, and (iv) the incorporation of the granularity to the above approach without significantly increasing the computational cost of the simulations, resulting in a model that offers the best realism/performance ratio of all the current methods in the literature, to the best of our knowledge. The methodology introduced in this thesis represents a step forward in modeling skyrmions under realistic conditions since it is efficient, yet simple enough, to be spread throughout the community.
Modelling Nanomagnetic Systems: Towards the Skyrmionic Bit
Castell Queralt, J. (Author). 31 Mar 2023
Student thesis: Doctoral thesis
Student thesis: Doctoral thesis