Ultra sharp domain walls in the closure domain pattern of
Max-Planck-Institut für Mikrostrukturphysik -
Weinberg 2, 06120 Halle, Germany
Accepted: 22 October 2001
We present high-resolution measurements on the closure domain pattern of obtained with spin-polarized scanning tunneling microscopy. Besides the well-estab lished wide surface domain walls we find ultra sharp sections of the wall. The width of these walls is only 1.1, an order of magnitude less than previously observed in bulk . The ultra sharp domain walls are explained on the basis of a micromagnetic model taking into account the competition of exchange energy and magnetic anisotropy.
PACS: 75.60.Ch – Domain walls and domain structure / 68.37.Ef – Scanning tunneling microscopy (including chemistry induced with STM) / 75.70.Rf – Surface magnetism
© EDP Sciences, 2002