My Community

Dear Vasp Users and administrators of this site.

I want to calculate the magnetic system which is
G type antiferromagnet of perovskite.

I want to know the easy axis of magnetic moment,
how to find it by VASP?

Constrain the magnetic moment by hand, and compare
enegies amont some cases?

Or are there some method automatically find easy axis
of spin polarization direction.

Sincerely.

if vasp does not relax to the most stable non-collinear solution automatically, you have to compare the total energies of the magnetic configurations, you are right. I strongly recommend to use the latter approach.