The Formation and Coarsening of the Concertina Pattern

Details The Formation and Coarsening of the Concertina Pattern The Formation and Coarsening of the Concertina Pattern

2011-06-16

arxiv.org/abs/1106.3573v1

Physics

Condensed Matter

Materials Science

Scientific paper

The concertina is a magnetization pattern in elongated thin-film elements of a soft material. It is a ubiquitous domain pattern that occurs in the process of magnetization reversal in direction of the long axis of the small element. Van den Berg argued that this pattern grows out of the flux closure domains as the external field is reduced. Based on experimental observations and theory, we argue that in sufficiently elongated thin-film elements, the concertina pattern rather bifurcates from an oscillatory buckling mode. Using a reduced model derived by asymptotic analysis and investigated by numerical simulation, we quantitatively predict the average period of the concertina pattern and qualitatively predict its hysteresis. In particular, we argue that the experimentally observed coarsening of the concertina pattern is due to secondary bifurcations related to an Eckhaus instability. We also link the concertina pattern to the magnetization ripple and discuss the effect of a weak (crystalline or induced) anisotropy.

Affiliated with

Also associated with

No associations

Rating

The Formation and Coarsening of the Concertina Pattern 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 The Formation and Coarsening of the Concertina Pattern, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Formation and Coarsening of the Concertina Pattern will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-190819