Magnetization damping in a local-density approximation

Details Magnetization damping in a local-density approximation Magnetization damping in a local-density approximation

2006-11-22

arxiv.org/abs/cond-mat/0611588v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 41 references, no figures

Scientific paper

The linear response of itinerant transition metal ferromagnets to transverse magnetic fields is studied in a self-consistent adiabatic local-density approximation. The susceptibility is calculated from a microscopic Hamiltonian, including spin-conserving impurities, impurity induced spin-orbit interaction and magnetic impurities using the Keldysh formalism. The Gilbert damping constant in the Landau-Lifshitz-Gilbert equation is identified, parametrized by an effective transverse spin dephasing rate, and is found to be inversely proportional to the exchange splitting. Our result justify the phenomenological treatment of transverse spin dephasing in the study of current-induced magnetization dynamics in weak, itinerant ferromagnets by Tserkovnyak \textit{et al.}. We show that neglect of gradient corrections in the quasiclassical transport equations leads to incorrect results when the exchange potential becomes of the order of the Fermi energy.

Affiliated with

Also associated with

No associations

Rating

Magnetization damping in a local-density approximation 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 Magnetization damping in a local-density approximation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetization damping in a local-density approximation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-368295