The authors reported in their letter some outstanding experimental results of spin excitations in nano-particles investigated by near-field Brillouin scattering. They conclude from their observations that existing theories — in particular micromagnetic simulations — do not correctly describe the behavior of the spin modes. Since excellent agreement has been reported between spin-wave mode frequencies obtained from Brillouin scattering experiments and those obtained from micromagnetic-based simulations,1–3 it is somewhat surprising that the simulations should fail for the particles investigated in the mentioned letter. Furthermore, since no simulations have been reported for the particles in question, the conclusion that micromagnetic simulations are wrong is based on assumptions regarding the interpretation of their observations.
Comment on "Mapping of localized spin-wave excitations by near-field Brillouin light scattering" [Appl. Phys. Lett. 97, 152502 (2010)]
GIOVANNINI, Loris;MONTONCELLO, Federico;NIZZOLI, Fabrizio;VAVASSORI, Paolo;
2011
Abstract
The authors reported in their letter some outstanding experimental results of spin excitations in nano-particles investigated by near-field Brillouin scattering. They conclude from their observations that existing theories — in particular micromagnetic simulations — do not correctly describe the behavior of the spin modes. Since excellent agreement has been reported between spin-wave mode frequencies obtained from Brillouin scattering experiments and those obtained from micromagnetic-based simulations,1–3 it is somewhat surprising that the simulations should fail for the particles investigated in the mentioned letter. Furthermore, since no simulations have been reported for the particles in question, the conclusion that micromagnetic simulations are wrong is based on assumptions regarding the interpretation of their observations.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
