MagEx : CUDA-Accelerated Finite-Difference Time-Domain Micromagnetic Simulator

A finite-difference time-domain CUDA micromagnetic simulator.

Work contributing to the thesis "Micromagnetic Simulations of High-Speed Magnonic Devices" https://hdl.handle.net/10871/128930

Implementation

• C CUDA
• FFT convolution for computation of the demagnetising field
• Time integration by explicit or Implicit (ESDIRK) 5th order Runge-Kutta methods
• 2nd order centred-difference Laplacian for the exchange interaction with Neumann boundary conditions.

Validation

Results compared with all $\mu\text{Mag}$ micromagnetic standard problems.

Example : Switching of a Permalloy Stripe ( 1024 x 512 x 2 ) - Mx -

PermalloyStripeSwitching_v2.mp4