Physics – Condensed Matter – Materials Science
Scientific paper
2010-05-18
Journal of Magnetism and Magnetic Materials, Volume 322, Issue 19, October 2010, Pages 2824-2833
Physics
Condensed Matter
Materials Science
35 pages, 11 figures, Journal of Magnetism and Magnetic Materials, in press.
Scientific paper
10.1016/j.jmmm.2010.04.037
This paper presents the results of simulations of the magnetization field {\it ac} response (at $2$ to $12$ GHz) of various submicron ferrite particles (cylindrical dots). The ferrites in the present simulations have the spinel structure, expressed here by M$_{1-n}$Zn$_{n}$Fe$_2$O$_4$ (where M stands for a divalent metal), and the parameters chosen were the following: (a) for $n=0$: M = \{ Fe, Mn, Co, Ni, Mg, Cu \}; (b) for $n=0.1$: M = \{ Fe, Mg \} (mixed ferrites). These runs represent full 3D micromagnetic (one-particle) ferrite simulations. We find evidences of confined spin waves in all simulations, as well as a complex behavior nearby the main resonance peak in the case of the M = \{ Mg, Cu \} ferrites. A comparison of the $n=0$ and $n=0.1$ cases for fixed M reveals a significant change in the spectra in M = Mg ferrites, but only a minor change in the M = Fe case. An additional larger scale simulation of a $3$ by $3$ particle array was performed using similar conditions of the Fe$_3$O$_4$ (magnetite; $n=0$, M = Fe) one-particle simulation. We find that the main resonance peak of the Fe$_3$O$_4$ one-particle simulation is disfigured in the corresponding 3 by 3 particle simulation, indicating the extent to which dipolar interactions are able to affect the main resonance peak in that magnetic compound.
Dantas Christine C.
Gama Adriana M.
No associations
LandOfFree
Micromagnetic simulations of spinel ferrite 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 Micromagnetic simulations of spinel ferrite particles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micromagnetic simulations of spinel ferrite particles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-58003