NuMagSANS – Example 3: MuMax3-Based Simulation Pipeline for an Ensemble of Iron Nanoparticles with Vortex Spin Textures

This repository provides the simulation and post-processing pipeline for modeling a dilute ensemble of spherical iron nanoparticles with cubic magnetocrystalline anisotropy using MuMax3 and the NuMagSANS framework.The code automates hysteresis-loop simulations over a set of random magnetic-field orientations and applies a back-rotation procedure to emulate random anisotropy axes.Each simulation represents a single, decoupled nanoparticle; the ensemble behavior is reconstructed statistically by averaging over all orientations.This approach suppresses artificial anisotropies caused by discretization effects and provides reproducible reference data for benchmarking NuMagSANS and related magnetic small-angle neutron scattering (SANS) analyses.All scripts and input files required to reproduce the simulations are included. Note: The MuMax3 binaries are not included and must be downloaded from the official distribution site:https://mumax.github.io/ Note: The NuMagSANS binaries are not included and must bed downloaded from the official distribution site: https://github.com/AdamsMP92/NuMagSANS.git本仓库提供了基于MuMax3（MuMax3）与NuMagSANS（NuMagSANS）框架，对具有立方磁晶各向异性的稀分散球形铁纳米颗粒集合体进行建模的模拟与后处理流程。该代码可自动完成多组随机磁场取向下的磁滞回线模拟，并通过反向旋转流程模拟随机各向异性轴的分布。每一次模拟均代表单个独立的纳米颗粒；集合体的整体行为可通过对所有取向进行统计平均来重构。该方法可抑制离散化效应带来的人工各向异性，可为NuMagSANS及相关磁性小角中子散射（Small-Angle Neutron Scattering，SANS）分析提供可复现的参考基准数据。所有可复现该模拟所需的脚本与输入文件均已随仓库包含。 注意：MuMax3二进制文件未随仓库提供，需从官方发布站点下载：https://mumax.github.io/ 注意：NuMagSANS二进制文件未随仓库提供，需从官方发布站点下载：https://github.com/AdamsMP92/NuMagSANS.git