Table 1

% Co    tFe(Å)  tAg(Å)  tCoFe(Å) CoFe K1(105erg/cm3)
0   127 83  0   3.8
30  81  58  84  1.4
47  88  60  80  -4.2
71  76  98  84  -4.1
100 81  84  111 14.4

Table I. Basic properties of the Fe/Ag/Co_xFe_1-x alloy sandwiches. The layer thicknesses were determined using x-ray fluorescence and Auger intensity measurements. The values of K₁, the four-fold magnetocrystalline anisotropy for the alloy layer, were determined using ferromagnetic resonance measurements. For bulk Fe, the value of K¹ is 4.2 x 10⁵ erg/cm³. Similar values are seen in Fe thin films. For the Fe/Ag/Fe film, the quoted Fe layer thickness is half the total measured Fe thickness. The Ag thickness includes the cap layer.