QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: tahereh2647 on November 20, 2025, 12:14

Title: How to obtain I–V curves for MTJ devices (parallel and antiparallel states)
Post by: tahereh2647 on November 20, 2025, 12:14

Hi everyone,
I am working on MTJ (magnetic tunnel junction) devices and I would like to calculate the I–V characteristics for both P and AP magnetic configurations.
I have a few questions:
1. Which calculator and settings should I use to obtain the I–V curves for MTJ devices?
• For example, what type of calculator is appropriate and what are the important settings (k-point sampling, bias range, etc.) for reliable I–V results?
2. Is it a good approach to first calculate the transmission spectra  and then use a Python script to compute the I–V curve from the transmission data?
3. Or is it better to use the built-in “IVCharacteristic” analysis in the Workflows to directly obtain the I–V curve?
• If so, how should I set it up correctly for an MTJ device in the parallel and antiparallel states?

Thank you in advance for your guidance!