A theoretical and experimental study of 360°-walls in magnetically coupled bilayers

Author

Sanneck, EIke ; Rührig, Manfred ; Hubert, Andreas

Author_Institution

Inst. fur Werkstoffwiss., Erlangen-Nurnberg Univ., Germany

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2500

Lastpage

2505

Abstract

360°-walls in magnetic bilayers with a weak ferromagnetic coupling are calculated and analyzed microscopically. An important aspect of the calculations is the proper treatment of both local and nonlocal contributions to the stray field energy. The equilibrium zigzag angle of these walls is calculated, and found to agree with experimental observations. It is not obvious whether the observed walls consist of 360°-walls in both layers, or rather of 360°-0°-combinations. Conditions for separating the two cases in the microscope are derived from the calculations. Experiments are found to be in agreement with the computations if predominantly 360°-0°-pairs rather than 360°-360°-pairs are assumed to exist in reality

Keywords

Permalloy; ferromagnetic properties of substances; magnetic domain walls; magnetic multilayers; 1D micromagnetics; 360°-walls; Kerr microscopy; Permalloy films; equilibrium zigzag angle; local contributions; magnetic domain walls; magnetically coupled bilayers; nonlocal contributions; stray field energy; weak ferromagnetic coupling; Couplings; Magnetic analysis; Magnetic films; Magnetic force microscopy; Magnetic multilayers; Magnetic sensors; Magnetic separation; Magnetosphere; Micromagnetics; Sensor phenomena and characterization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.280972

Filename

280972