I've like added a muRata filter at its output. This filter is a comprehensiveSome portion of that ringing is due to your scope probe ground. You should always measure the output of a SMPS with a VERY short ground probe. The typical method is to remove the ground clip and wind some bus wire around the ground ring on the probe and leave a little bit sticking out to use as a ground lead. You want to measure that ringing directly across the output cap.
I would bet that almost half of your ringing is caused by the probe. The rest is mostly circuit layout. Only so much you cn do with a breadboard.
Have you thought about adding a second stage low pass filter on the output? Just a simple LC filter?
package which inludes ferite bead, 3-terminal cap. But the results seem s
little useless.
Do u think adding on another LPF will work?