Table 1

% Co    AMR (%) MRpeak (%) DeltaThetapeak  G      Rho (µOhm-cm) DeltaR (µOhm-cm)
0   0.200     0.391     90°    0.782    14.6       0.11
0   0.194     0.382     90°    0.764    13.5       0.11
30  0.158     0.726     ?   ?    15.0        ?
47  0.114     0.913     135°   1.291    17.5       0.23
47  0.111     0.809     135°   1.144    17.5       0.20
71  0.107     0.561     135°   0.793    12.5       0.10
71  0.102     0.623     135°   0.881    12.3       0.11
100 0.071     0.609     180°   0.609    11.2       0.068

Table II. Transport properties of Fe/Ag/Co_xFe_1-x alloy sandwiches. Double entries are measurements on two different pieces of the same sandwich. The differences between these nominally identical sets of numbers therefore give an idea of the reproducibility of the magnetoresistance measurements and the homogeneity of the samples. r is the zero-field room-temperature resistivity. The MR_peak and DeltaTheta_peak = (theta₁ - theta₂)_peak are data taken for the orientations shown in Figures 2-4 and discussed in the text. The giant magnetoresistance coefficient G is nominally orientation-independent. The Dr numbers are obtained by multiplying the resistivity by G. A ? means that the value could not be determined.