Inquiry Regarding Abnormal Breathing Mode Excitation of Skyrmion During Relaxation
Wanlu Yu
Dear All,
Thank you very much for your previous response regarding the initial size of the skyrmion. Your guidance was truly helpful.
I am now encountering a new issue in my simulations and would like to seek your advice once again.
My model setup is as follows:
Within a rectangular region, two magnonic waveguides are designed by modulating the saturation magnetization .
The waveguides are symmetrically placed on both sides of a skyrmion.
Two alternating magnetic fields ( and ) are applied to the left end of the upper waveguide and the skyrmion region, respectively.
My problem is: During the relaxation process, the Néel-type skyrmion is expected to exhibit a breathing mode (periodic expansion and contraction of its radius). However, in my simulation, the skyrmion repeatedly appears and annihilates at a fixed frequency instead of forming a stable breathing oscillation.
For your reference, I have attached my initialization script. I would greatly appreciate it if you could help me identify the potential causes of this issue.
Thank you very much for your time and support.
Best regards,
Yulu