We determine the lateral correlation length L of the magnetization reversal process in thin magnetic films. For this purpose, we have devised an experimental system, which allows tuning of the effective disorder level by means of the local bias field distribution acting upon the magnetic film. This disorder is hereby counteracting the intergranular exchange coupling within the film, which tends to synchronize the reversal process. We observe a sharpening of the switching field distribution upon narrowing the exchange bias field distribution. Quantitative comparisons between these two quantities allow the determination of L without the need for adjustable parameters.
ASJC Scopus subject areas
- General Physics and Astronomy