Magnetism and the Weiss Exchange Field - A Theoretical Analysis Inspired by Recent Experiments
Albert, C. ; Ferrari, L. ; Froehlich, J. ; Schlein, B.
arXiv, 0504674 / Harvested from arXiv
Text on arXiv
The huge spin precession frequency observed in recent experiments with spin-polarized beams of hot electrons shot through magnetized films is interpreted as being caused by Zeeman coupling of the electron spins to the so-called Weiss exchange field in the film. A "Stern-Gerlach experiment" for electrons moving through an inhomogeneous exchange field is proposed. The microscopic origin of exchange interactions and of large mean exchange fields, leading to different types of magnetic order, is elucidated. A microscopic derivation of the equations of motion of the Weiss exchange field is presented. Novel proofs of the existence of phase transitions in quantum XY-models and antiferromagnets, based on an analysis of the statistical distribution of the exchange field, are outlined.
Publié le : 2005-04-26
Classification:  Condensed Matter - Strongly Correlated Electrons,  Mathematical Physics 
@article{0504674,
     author = {Albert, C. and Ferrari, L. and Froehlich, J. and Schlein, B.},
     title = {Magnetism and the Weiss Exchange Field - A Theoretical Analysis Inspired
  by Recent Experiments},
     journal = {arXiv},
     volume = {2005},
     number = {0},
     year = {2005},
     language = {en},
     url = {http://dml.mathdoc.fr/item/0504674}
}

Albert, C.; Ferrari, L.; Froehlich, J.; Schlein, B. Magnetism and the Weiss Exchange Field - A Theoretical Analysis Inspired
  by Recent Experiments. arXiv, Tome 2005 (2005) no. 0, . http://gdmltest.u-ga.fr/item/0504674/