Real space observation of dipolar interaction in arrays of Fe microelements

摘要

Square lattice arrays of thin microelements of Fe are investigated by magnetic transmission x-ray microscopy. The influence of dipole interaction is analyzed by varying the interelement distance. For comparison isolated elements are prepared on the same sample. The magnetostatic field caused by interelement interaction leads to a substantial stabilization of the elements in the center of the array comparable to the magnetization process previously found by numerical solution of the Landau-Lifshitz equation for magnetic dot arrays. Micromagnetic simulations show that for high field strengths the dipolar interaction is collinear with the external field while in the low-field regime the strayfields have significant perpendicular components leading to a complex reversal mechanism.