A simple model of one form of this phenomenon shows that it is mostly a result of the difference of density of states at the Fermi level in spin subbands in both electrodes.
A simple model of one form of this phenomenon shows that it is mostly a result of the difference of density of states at the Fermi level in spin subbands in both electrodes. That model has been superseded by Slonczewski's model and was Julliere's model. This phenomenon can be used to determine whether a Fermi surface is in contact with the Brillouin zone boundary. This phenomenon can generally be observed when the mean angle turned between collisions, or the cyclotron frequency times relaxation time, is greater than one. Kohler's rule is a scaling rule for this phenomenon. One form of it is caused by the RKKY interaction and was discovered in antiferromagnetically coupled multilayers of iron and chromium by Baibich, et al. That was its "giant" form, which is used in hard drives. For 10 points, name this phenomenon, which includes the Hall effect, in which a material's resistivity changes with the application of a magnetic field.
A simple model of one form of this phenomenon shows that it is mostly a result of the difference of density of states at the Fermi level in spin subbands in both electrodes.
magnetoresistance [accept giant tunneling magnetoresistance before "Fermi surface" is read]