Title :
On Stability of Magnetization Dynamics in Nanoparticles
Author :
Mayergoyz, Isaak D. ; Serpico, Claudio ; Bertotti, Giorgio
Author_Institution :
Electr. & Comput. Eng., Univ. of Maryland, College Park, MD, USA
fDate :
6/1/2010 12:00:00 AM
Abstract :
It is rigorously demonstrated that spatially uniform magnetization oscillations in sufficiently small ellipsoidal nanoparticles can be unconditionally stable with respect to spatially nonuniform perturbations. The proof reveals the dominant stabilizing effect of exchange field which is mathematically manifested through the Poincare inequality.
Keywords :
exchange interactions (electron); magnetic particles; magnetisation; nanoparticles; spin waves; Poincare inequality; exchange field; magnetization dynamics stability; small ellipsoidal nanoparticles; spatially nonuniform perturbations; spatially uniform magnetization oscillations; spin-wave perturbations; Boundary conditions; Couplings; Educational institutions; Electromagnetics; Equations; Magnetic field measurement; Magnetization; Nanoparticles; Polarization; Stability; Landau-Lifshitz equation; magnetization dynamics; spin-wave instability;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2039119
