Antiferromagnet more subblatices

[matematikuvol]

In ordinary definition antiferromagnet lattice has to sublattices, one with spins up, and one with of spin down in $T=0$. Why in some cases people discuss situations with four or even more subblatices? Do you have explanation for this? Some references maybe?

 

[daveyrocket]

Do you have specific examples in mind?

 

[matematikuvol]

I'm speaking in general. I just see that in some papers some authors uses for example four sublattices for body centered cubic lattice. Why not two? I don't understand this.

 

[daveyrocket]

I could speculate about spin waves, or non-collinear antiferromagnetism, or with a non-elemental material there may be multiple magnetic sublattices, or some other situation but without something specific I can't say more than that.

 

[matematikuvol]

One example will be enough...