Schneider, M. and Liszkowski, J. and Rahm, M. and Wegscheider, Werner and Weiss, Dieter and Hoffmann, H. and Zweck, Josef (2003) Magnetization configurations and hysteresis loops of small permalloy ellipses. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 36 (18). pp. 2239-2243. ISSN 0022-3727
Full text not available from this repository.Abstract
We investigated systematically the easy axis magnetization reversal of 20 nm thick permalloy ellipses with a fixed major axis of 1.47 mum and minor axes of 0.22-1.47 mum. Lorentz transmission electron microscopy was used to image the micromagnetic configurations during magnetization reversal. Hysteresis loops of single ellipses were recorded by means of micro-Hall magnetometry and could be traced back to certain reversal mechanisms observed by Lorentz microscopy. In most cases, the magnetization reversal is initiated by the evolution of a magnetization buckling, followed by the formation of a single, a double, or a trapped vortex configuration. For ellipses with high aspect ratio (length-to-width ratio), the magnetization switches in the reversed magnetic field without creation of a stable vortex configuration. Our experiments show that the characteristic field values for vortex creation, single vortex annihilation, and switching strongly depend on the shape anisotropy of the elements.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | NIFE ELEMENTS; DOT ARRAYS; CO DOTS; VORTICES; REVERSAL; NANODISKS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Josef Zweck Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Dieter Weiss |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Jul 2021 10:02 |
| Last Modified: | 29 Jul 2021 10:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38599 |
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