Toothed Jagged perimeter of the top layer

https://preview.redd.it/3ryogf3rxizf1.jpg?width=1044&format=pjpg&auto=webp&s=0e6790d94b483e2a5cf050a79823aaa8922e963b

https://preview.redd.it/43uz9vc9yizf1.jpg?width=739&format=pjpg&auto=webp&s=cd42771a982ca5df1ef88ae9c6592434a7653d96

Hello,

I'm printing with a 0,6 mm hardened nozzle and both on pla the edges of the top layers has a toothed or jagged layout.

Does Anyone have an idea what the problem might be?

Thank You

Bye