S.S.P. Parkin, T.A. Rabedeau
Applied Physics Letters
We report giant magnetoresistance in [Ni81Fe19/Cu] N multilayers. Saturation magnetoresistance values exceeding 16% for saturation fields of only 600 Oe are found at 300 K. In addition, we show evidence for well-defined oscillations in saturation magnetoresistance as a function of Cu spacer layer thickness at 4.2 K, with an oscillation period and phase similar to that in Co/Cu multilayers. However, the temperature dependence of the magnetoresistance, while weak for thin Cu layers, is much stronger for thicker Cu layers. Consequently at 300 K only a single oscillation in magnetoresistance for thin Cu layers is found. We show that the properties of the Ni81Fe19/Cu multilayers are very sensitive to annealing at moderate temperatures, which may limit the possible technological applications of such structures.
S.S.P. Parkin, T.A. Rabedeau
Applied Physics Letters
R.F.C. Farrow, R.F. Marks, et al.
Journal of Applied Physics
H. Schwenk, S.S.P. Parkin, et al.
Physical Review Letters
W.J. Gallagher, D.W. Abraham, et al.
VLSI Technology 2005