D. Mauri, V.S. Speriosu, et al.
IEEE Transactions on Magnetics
The absolute change of sheet conductance (ΔG) of spin-valve multilayers is shown analytically and experimentally to be the macroscopic observable most directly related to the physical mechanism of giant magnetoresistance. Unlike the changes in resistance ΔR/R or ΔR, ΔG is directly connected to the changes in the Fermi spheres of the ferromagnetic layers induced by the variation in magnetic alignment. In structures comprising Si/Co 80 Å/Cu 25 Å/NiFe 50 Å/FeMn 90 Å/Ta 50 Å/Cu tCu/Ta 50 Å, in which only the thickness tCu is varied, the values and the thermal variations of ΔR/R(T) and ΔR(T) are strongly influenced by tCu through its shunting effect. In contrast ΔG is found to be independent of shunting.
D. Mauri, V.S. Speriosu, et al.
IEEE Transactions on Magnetics
B. Dieny, V.S. Speriosu, et al.
Journal of Magnetism and Magnetic Materials
M. Benaissa, P. Humbert, et al.
Journal of Magnetism and Magnetic Materials
J.A.C. Bland, R.D. Bateson, et al.
Journal of Magnetism and Magnetic Materials