Apparently the two classes are diamagnetism and paramagnetism. Best I can get from reading, diamagnetic materials are more random in their alignment (and repulsed by magnetic fields) and paramagnetic ones are more uniformly aligned (and attracted by fields). Can someone else explain it better?
The article seems to be talking about some new type of ordered alignment. They say anti-parallel, which made me think of overlapping orthogonal alignments, where neighbors are kind of perpendicular, but the image shows vectors which are mostly just slightly off from parallel, creating those swirls.
The article seems to be talking about some new type of ordered alignment. They say anti-parallel, which made me think of overlapping orthogonal alignments, where neighbors are kind of perpendicular, but the image shows vectors which are mostly just slightly off from parallel, creating those swirls.