Antiferromagnetism Types: G & A Types Explained

[jackanakanory]

Hi, I've been reading a lot of journals lately for my dissertation, and I keep reading about certain types of antiferromagnetism. For example, the material I've been reading up on (Bismuth ferrite) is a G-type antiferromagnet and I have also seen A-type referred to in other journals. What does this mean? Google searches have been useless!

Thanks

Jack

 

[shawl]

1....2
...4....3

5....6
...8....7

Please imaging that a 3-D cubic structure with eight lattice point, 1,2,3,4 is the top layer and 5,6,7,8 is the bottom layer. Ignoring the "...", I couldn't type more than 1 space.

A-type means: The direction of spins in the first layer are anti-parallel with that in the second layer. Or say, lattice point 1,2,3,4 is parallel with each other, and 5,6,7,8 is parallel with each other. But 1 is anti-parallel with 5.

G-type means: 1,3,5,7 is parallel and 2,4,6,8 is parallel. But 1 is anti-parallel with 2.

 

[jackanakanory]

Thank you very much, that makes sense. Is there a name for this notation so i can search to find more information about it? are there b c d e f types too?

 

[shawl]

I don't know where the information is.

There are only three type in my knowledge.

A type, C type and G type.

 

[abhi2005singh]

You can take a look at the figure attached.
Ref.: Nanoscale phase separation and colossal magnetoresistance by E. Dagotto, Springer-Verlag, Pg. 11.
You can see the page in Google Books

 

[jackanakanory]

Thank you, that is exactly what I was after!

 

[abhi2005singh]

Original reference: Phys. Rev. 100, 545 (1955).