Geometry-dependent head-to-head domain wall phase diagram and domain wall widths in ferromagnetic ring structures

Author

Laufenburg, M. ; Kläui, M. ; Ehrke, H. ; Vaz, C.A.F. ; Bland, J.A.C. ; Heyderman, L.J. ; Nolting, F. ; Bauer, E. ; Cherifi, S. ; Heun, S. ; Locatelli, A. ; Dunin-Borowski, R. ; Rudiger, U.

Author_Institution

Fachbereich Phys., Konstanz Univ., Germany

fYear

2005

fDate

4-8 April 2005

Firstpage

919

Lastpage

920

Abstract

Systematical investigation of more than 40 different geometries of Co and Py rings are made and phase transitions between different domain wall types as a function of the geometrical parameters is determined. In phase diagrams, the critical parameters where the transitions occur are directly correlated with the energy terms that govern the domain wall type (exchange energy vs. stray field energy). Comparison with theoretical calculations and micromagnetic simulations reveal the importance of local energy minima, and the geometry-dependent height of the energy barriers can be derived.

Keywords

cobalt; ferromagnetic materials; magnetic domain walls; magnetomechanical effects; micromagnetics; phase diagrams; phase transformations; Co; critical parameters; domain wall width; energy barrier height; exchange energy; ferromagnetic ring structure; geometrical parameters; geometry-dependent head-to-head domain wall phase diagram; local energy minima; micromagnetic simulation; phase transition; stray field energy; theoretical calculation; Electrons; Geometry; High-resolution imaging; Laboratories; Magnetic domain walls; Magnetic domains; Magnetoresistance; Micromagnetics; Physics; Solid modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463888

Filename

1463888