Magnon-Paramagnon Effective Theory of Itinerant Ferromagnets

Details Magnon-Paramagnon Effective Theory of Itinerant Ferromagnets Magnon-Paramagnon Effective Theory of Itinerant Ferromagnets

1999-08-02

arxiv.org/abs/cond-mat/9908024v3

J.Phys.:Condens.Matter, 15 (2003) 2797

Physics

Condensed Matter

14 pages, changed content,new results

Scientific paper

10.1088/0953-8984/15/17/329

The present work is devoted to the derivation of an effective magnon-paramagnon theory starting from a microscopic lattice model of ferromagnetic metals. For some values of the microscopic parameters it reproduces the Heisenberg theory of localized spins. For small magnetization the effective model describes the physics of weak ferromagnets in accordance with the experimental results. It is written in a way which keeps O(3) symmetry manifest,and describes both the order and disordered phases of the system. Analytical expression for the Curie temperature,which takes the magnon fluctuations into account exactly, is obtained. For weak ferromagnets $T_c$ is well below the Stoner's critical temperature and the critical temperature obtained within Moriya's theory.

Affiliated with

Also associated with

No associations

Rating

Magnon-Paramagnon Effective Theory of Itinerant Ferromagnets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Magnon-Paramagnon Effective Theory of Itinerant Ferromagnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnon-Paramagnon Effective Theory of Itinerant Ferromagnets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-37449