Can we reproduce Heli(or screw)magnetism?

Message

againsmile · #1 Post by **againsmile** » Fri Feb 15, 2008 8:10 pm

Dear All,

I found the fact that my system has a screw antiferromangetic. From the literature, I can see how the magnetics are aligns but I'm not sure I can handle such a different direction spins. The only tag I used for the spin is MAGMOM tag. Using the + and - , I set the direction of the spins. Then, how can I set the various direction of spins?

And, I found one of the literature and on that literature they just consider it is a ferromagntism.

If you have any idea about this, please give me a hint.

Thanks,

forsdan · #2 Post by **forsdan** » Sat Feb 16, 2008 8:34 am

In general if you want to specify a arbitrary direction of the magnet moments you have to do non-collinear calculations (LNONCOLLINEAR = .TRUE.) and under MAGMOM specify a vector for each atom. Second I'm not quite sure if you are referring to spin spiral states, but in that case this previous forum post might be helpful:

http://cms.mpi.univie.ac.at/vasp-forum/ ... c.php?4.94

Hope it helps to some degree.

Best regards,
/Dan

<span class='smallblacktext'>[ Edited Sat Feb 16 2008, 09:44AM ]</span>