Magnetic domain wall dynamics in the presence of an in-plane field
The purpose of this work is to understand the domain wall dynamics in the presence of high drive fields and inplane fields in magnetic bubble materials. Bubble radial expansion method is used to investigate the non-linear region. Saturation velocity is found at low in-plane fields and a drive depend...
| Summary: | The purpose of this work is to understand the domain wall dynamics in the presence of high drive fields and inplane fields in magnetic bubble materials. Bubble radial expansion method is used to investigate the non-linear region. Saturation velocity is found at low in-plane fields and a drive dependent region at higher in-plane fields. The in-plane field increases all the velocities. There is velocity anisotropy and the wall along the in-plane field generally has a higher velocity than the one normal to it. The domain wall is dynamically deformed through the thickness at high drive and in-plane fields. This deformation is studied in the bulk of the film by transmission (Faraday) mode and at the surfaces by reflection (Kerr) mode. The mechanism for the deformation is based on the spatial variations of the effective in-plane field through the thickness. This causes different parts of the wall to move with different velocities resulting in a deformed wall. The characteristics of the deformed wall are studied in detail for several samples.
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