New magnetostatic modes in small nonellipsoidal magnetic particles

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

16 pages, 6 figures, conferences paper: Physics of Magnetism'05, Poznan, Poland

Scientific paper

10.1002/pssb.200562447

Magnetostatic normal modes are investigated here in elongated rods. The dipolar field resulting from the dipole-dipole interactions is calculated numerically in points of the axis connecting opposite rod face centers (\emph{central axis}) by collecting individual contributions to this field coming from each of the atomic planes perpendicular to the central axis. The applied magnetic field is assumed to be oriented along the central axis, and the magnetization to be uniform throughout the sample. The \emph{frequency} spectrum of magnetostatic waves propagating in the direction of the applied field is found numerically by solving the Landau-Lifshith equation of motion with the spatially \emph{nonhomogeneous} dipolar field taken into account; the mode amplitude \emph{profiles} are depicted as well. While energetically highest modes have \emph{bulk-extended} character, the modes forming the lower part of the spectrum are localized in the subsurface region (\emph{bulk-dead modes}). Between these two mode types, magnetostatic modes of a new type (\emph{comb modes}) are found to occur, characterized by two clearly discernible regions: a zone of fast amplitude oscillations inside the rod, and narrow slow-oscillation regions at the borders. Absorbing virtually no energy from an applied alternating field, comb modes will have no significant contribution to the magnetic noise.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

New magnetostatic modes in small nonellipsoidal magnetic particles 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 New magnetostatic modes in small nonellipsoidal magnetic particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New magnetostatic modes in small nonellipsoidal magnetic particles will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-365252

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.