Figure 1:
Magnetization curve with H along a [110] direction for an
Fe-Cr-Fe sandwich with a 13Å Cr layer. The data is
indicated by solid lines, while the calculated curve produced
from Eqns. 1 and 2 is indicated by the solid dots. The
calculation employed the parameters K1/M = 0.25
kOe, Ku/M = 0.005 kOe, and J/M = 0.125 kOe.[5,7]
The solid-headed arrows indicate the orientation of the
moments of the two Fe films at a given applied field.
Figure 2:
Transverse magnetoresistance trace in decreasing field for
the same tCr = 13Å sample as in Fig. 1. The experimental geometry is
indicated in the inset.
Figure 3:
Magnetoresistance of a Fe-Cr-Fe sandwich versus the angle
between the applied field and the current direction. The fit
is to Eqn. 3.
Figure 4:
Calculated and experimental angular separations of the
moments of the two Fe films as a function of applied field.
The angles are defined pictorially in the inset. The
calculated points are obtained by minimizing the energy
expressions of Eqns. 1 and 2, all parameters being held
fixed. The "experimental" DeltaPhi points are obtained by
transforming the data of Fig. 2
according to Eqn. 4.
Figure 5:
Transverse magnetoresistance magnitude at 6 kOe as a function
of the coupling J/M for a series of Fe-Cr-Fe sandwiches. The
coupling is varied by changing the Cr thickness. The solid
line is the best linear fit to the data.