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

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.

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Cited by in corpus (12)

• A review of modelling in ferrimagnetic spintronics
• Computation of magnetization, exchange stiffness, anisotropy, and susceptibilities in large-scale systems using GPU-accelerated atomistic parallel Monte Carlo algorithms
• Micromagnetic study of spin transport in easy-plane antiferromagnetic insulators
• Berry Curvature and Topological Hall Effect in Magnetic Nanoparticles
• Speeding up explicit numerical evaluation methods for micromagnetic simulations using demagnetizing field polynomial extrapolation
• Self-Consistent Computation of Spin Torques and Magneto-Resistance in Tunnel Junctions and Magnetic Read-Heads with Metallic Pinhole Defects
• Magnetization Dynamics in Quasiperiodic Magnonic Crystals
• NeuralMag: an open-source nodal finite-difference code for inverse micromagnetics
• A proposal for leaky integrate-and-fire neurons by domain walls in antiferromagnetic insulators
• Micromagnetic Monte Carlo method with variable magnetization length based on the Landau-Lifshitz-Bloch equation for computation of large-scale thermodynamic equilibrium states
• Zeta expansion for long-range interactions under periodic boundary conditions with applications to micromagnetics
• Thickness-dependent magnon spin transport in antiferromagnetic insulators: Crossover from quasi-three-dimensional to quasi-two-dimensional regimes