Magnetic domain wall trapping by in-plane surface roughness modulation

Swerts, J.; Temst, K.; Van Bael, M. J.; Van Haesendonck, C.; Bruynseraede, Y.
February 2003
Applied Physics Letters;2/24/2003, Vol. 82 Issue 8, p1239
Academic Journal
Using the influence of surface roughness on the coercivity of thin magnetic films, we have produced an artificially modulated magnetic domain configuration in a chemically homogeneous polycrystalline thin magnetic film. This is achieved by evaporating a thin Fe film on top of a smooth substrate that was previously covered with an array of considerably rougher Ag lines. Magneto-optical Kerr effect measurements revealed the presence of two distinct switching fields in the hysteresis loops. In the intermediate state, a stable magnetic domain configuration of antiparallel aligned domains is achieved. Magnetic force microscopy images indicate that interacting cross-tie domain walls are separating the magnetic domains.


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