November 16, 2016



Open source, cross-platform spin simulation framework
Spirit on GitHub

Spirit is developed in large part at the PGI-1/IAS-1 institute at the Forschungszentrum Jülich. The spin simulation WebApp on JuSpin was developed in the context of the Spirit framework and is based on its web-interface.

The core of Spirit is written in C++ and designed to run platform-independently. Note that Python bindings are also available. A GPU acceleration using CUDA is in development. You may find the source code at

It’s most important features include:

  • Fast cross-platform C++ core with CUDA support
  • Spin dynamics simulations and energy minimizations
  • Transition path calculations using a nudged elastic band method
  • C API and Python bindings (other languages also possible)
  • Parameter Control during Simulations
  • Powerful live visualisations in desktop user interface
  • Easy and portable spin simulations in web interface


The Desktop User Interface

The following image shows the desktop user interface that is provided with Spirit. In comparison to the web interface, it provides additional calculation methods, a choice of optimizers and advanced parameter and configurations customisation.


Note the plot in the lower right, showing the energy barrier for the transition of the skyrmion to the homogeneous state (blue points are the discrete images, the red point is the visualised state).

The Desktop User Interface includes powerful visualisations which enable the detailed study of complex 3D states, as illustrated by the following example containing straight, bent and bifurcated Skyrmions, as well as Bobbers:


Installation Instructions

Can be found in the Readme on GitHub…