  I analyze in details distribution of local magnetic field induced by micro-
and nano-magnets. I consider three kinds of elongated magnetic islands:
ellipse-, diamond- and rectangular shaped islands which were magnetized
uniformly along long axis. This report concentrates on the role of their shape
upon distribution of the field. Calculations show that unlike
rectangular-shaped magnet, ellipse-shaped and diamond-shaped ones produce much
more localized field in proximity of its magnetic poles. Additionally in the
case of ellipse-shaped islands the magnitude of induced field is large. This
two facts favor arrays of ellipse-shaped magnetic islands to build
zero-dimensional spin traps in a hybrid based on Ferromagnet/Semiconductor
structure.
