Figure 1: (a)
Magnetization curves for two Fe-Cu-Co-Cu sandwiches (see
inset) grown on glass at different deposition temperatures.
The shoulder in the magnetization of the 165 °C sample
indicates the region where the Fe and Co moments are
antialigned.
(b) Room-temperature transverse magnetoresistance curves for
the same two samples. The 220 °C sample with the square
magnetization curve has an MR trace typical for a single thin
ferromagnetic film, whereas the 165 °C sample has an
increased resistance when the moments of the two films are
antialigned.
Figure 2:
Transverse magnetoresistance for two
Fe51Å/Cu55Å/Co48Å sandwiches which were
deposited simultaneously, one on glass and one on a
semi-insulating Si substrate. The growth temperature was 165
°C.
Figure 3:
Co-thickness dependence of the anisotropic magnetoresistance
(AMR) and spin-valve magnetoresistance for a series of
Fe-Cu-Co-Cu sandwiches. These samples were deposited on glass
at 165 °C, and had the structure
Fe56Å/Cu50Å/Co(tCo)/Cu30Å.