|MadSci Network: Physics|
I'm trying to understand the difference between diamagnets, paramagnets, and ferromagnets. I understand the different characteristics, but I'm having a hard time understanding the forces behind them. For diamagnetic characteristics to be predominant, a material must have no unpaired electrons. When this material is placed in a magnetic field, it seems as though the field would try to force half of the electrons to spontaneously flip their spin, but the other electron in any given orbital won't allow this, so the two are pushing against each other. Is this correct? Paramagnets make sense. Ferromagnets sort of make sense...but I can't find any specific information on exchange coupling anywhere on this site (or really anywhere else online either) and how exchange coupling causes large numbers of atoms/electrons to work together. One thing I read mentioned in passing that this is because electric interaction between electrons in a ferromagnet push them into a state of having similar spins, and this electric push overcomes any quantum push to have opposing spins. I think I'm really mixed up on that part...any help would be appreciated. Please include any extra reading materials that would be helpful. Thanks.
Re: What is exchange coupling in ferromagnets?
Try the links in the MadSci Library for more information on Physics.