Boris Computational Spintronics -- High Performance Multi-Mesh Magnetic and Spin Transport Modelling Software

TL;DR

Boris is an open-source multi-physics software for spintronics research that enables high-performance modeling of complex magnetic, spin transport, and heat flow phenomena in multi-material structures, optimized for GPU acceleration.

Contribution

This work introduces Boris, a novel multi-mesh, multi-physics software combining micromagnetics, spin transport, and heat flow modeling with GPU acceleration for high performance.

Findings

Performance up to twice faster than Mumax3 on GPU

Supports complex multi-layered and multi-material structures

Includes models for ferromagnetic, antiferromagnetic, and ferrimagnetic materials

Abstract

This work discusses the design and testing of a new computational spintronics research software. Boris is a comprehensive multi-physics open-source software, combining micromagnetics modelling capabilities with drift-diffusion spin transport modelling and heat flow solver in multi-material structures. A multi-mesh paradigm is employed, allowing modelling of complex multi-layered structures with independent discretization and arbitrary relative positioning between different computational meshes. Implemented micromagnetics models include not only ferromagnetic materials modelling, but also two-sublattice models, allowing simulations of antiferromagnetic and ferrimagnetic materials, fully integrated in the multi-mesh and multi-material design approach. High computational performance is an important design consideration in Boris, and all computational routines can be executed on GPUs, in addition to CPUs. In particular a modified 3D convolution algorithm is used to compute the demagnetizing field on the GPU, termed pipelined convolution, and benchmark comparisons with existing GPU-accelerated software Mumax3 have shown performance improvements up to twice faster.