text: FIG. 6: Rotation angle ∆ϕl between magnetic moments on 
  NN layers (l + 1, l) at some low temperatures, for thickness 
  n = 5 and n = 6, and lateral dimension L = 64. 
  
  the same is true for the crossing point of the Binder cu- 
  mulant of the average magnetization M (not reported in 
  ﬁgure), which is located at TC(8) = 133.3(3) K. These 
  data give a ﬁrst rough indication that also for n = 8 all 
  the planes of the sample are still ordering almost at the 
  same temperature; such property has been observed for 
  all the investigated thicknesses n below 16, so that TC(n) 
  results quite n-independent (see also Fig. 5) . 
  l , M y 
  
  where (M x 
  l ) is the magnetic vector proﬁle for each 
  plane l. ∆ϕl is displayed in Fig. 6a and Fig. 6b, for 
  n = 6 and n = 5, respectively. In Fig. 6a, a quite clear 
  fan stabilization is observed when the temperature de- 
  for n = 5, ∆ϕl keeps an 
  creases, while in Fig. 6b, i.e. 
  almost temperature independent very small value; what’s 
  more, ∆ϕl seems to loose any temperature dependence 
  as T = 0 is approached. We attribute the absence of fan 
  arrangement for n ≤ 5 as simply due to the lack of “bulk 
  planes” inside the ﬁlm, so that we are left with only a 2d 
  trend at TC(n), i.e. at the temperature where the order 
  parameters deﬁned in Eqs. (2) and (3) show a critical 
  behaviour. 