I want to know, how to do calculations in VASP about Spin polarized?
What must be the INCAR, KPOINTS, POSCAR. Thanks.
You can turn on spin-polarization in VASP by specifying ISPIN=2 and specifying the magnetic moments using the MAGMOMS flag in the INCAR file. No specific changes to KPOINTS or POSCAR are necessary, as far as I know.
Just FYI, this forum is primarily intended for the discussion of the Materials Project data and infrastructure, so you might have better luck consulting the VASP documentation for VASP-related questions.