Issue with domain wall velocity calculation in MuMax3

[Naintara]

Hello MuMax3 community,

I am simulating a magnetic strip in MuMax3 and forming two domain walls in the strip using excitation. I am trying to calculate the domain wall velocity, but it is showing zero value.

I am not sure why this is happening.

Any suggestions on what might be going wrong would be really helpful.

Thanks in advance.

[Naintara]

Could anyone please help me with this?

[Антон Луценко]

My recommendation would be to get the raw simulation data (magnetization dynamics saved as OVF files) and postprocess it in a software of your choice, where you can tweak and tune the algorithm, rather than to rely on built-in implementation in mumax. This will be much simpler. 

[Jonathan Maes]

Hi,

The simulation in the provided script is symmetric. After relaxation, the sudden excitation creates a domain wall traveling to the left and one traveling to the right. Functions with "ext_" before them indicate extensions that may make certain assumptions about the system: here, the assumption is that there should be only one domain wall. Indeed, post-processing the script as suggested above will likely form more robust solution for your problem.

Best regards,

Jonathan

Op dinsdag 5 mei 2026 om 16:41:32 UTC+2 schreef lutsenk...@gmail.com: