Micromagnetic analysis of a domain wall internal structure in ultrathi
n magnetic film is carried out. The case when the film thickness is mu
ch smaller than the exchange length (the effective width of a Bloch li
ne) is considered. It is shown that in this limiting case the angle of
the domain wall twisting is very small and the domain wall has the qu
asi-Bloch structure. (C) 1998 Elsevier Science B.V. All rights reserve
d.