
       Figure 2: Spin-valve MR and anisotropic MR
      (AMR) versus Fe thickness for a series of 5
      Fe(tFe)-Cu(61Å)-Co(55Å)-Cu(36Å)
      sandwiches grown on silicon substrates at 160 ûC. The
      spin-valve MR is the isotropic component of the total MR. The
      dashed line is a fit to the AMR data with form AMR = 0.097% +
      (0.002%/Å)tFe.