The design and verification of Mumax3

TL;DR

Mumax3 is an open-source GPU-accelerated micromagnetic simulation software that enables large-scale, high-performance simulations of magnetic materials with various extensions, verified against analytical and standard problems.

Contribution

This paper introduces mumax3, a novel GPU-based micromagnetic simulation tool with unique features and verified accuracy, enhancing simulation capabilities for magnetic research.

Findings

High performance and low memory usage enable large-scale simulations.

Verified accuracy through comparison with analytical solutions and standard problems.

Includes specialized extensions like MFM image generation and moving simulation window.

Abstract

We report on the design, verification and performance of mumax3, an open-source GPU-accelerated micromagnetic simulation program. This software solves the time- and space dependent magnetization evolution in nano- to micro scale magnets using a finite-difference discretization. Its high performance and low memory requirements allow for large-scale simulations to be performed in limited time and on inexpensive hardware. We verified each part of the software by comparing results to analytical values where available and to micromagnetic standard problems. mumax3 also offers specific extensions like MFM image generation, moving simulation window, edge charge removal and material grains.