N. Thangaraj, C.J. Echer, et al.
Journal of Applied Physics
Antiferromagnetically coupled permalloy/Au multilayers display giant magnetoresistance (GMR) with large changes in resistance in very low fields. We show that thermal annealing of such structures, exhibiting GMR, leads to a quenching of the magnetoresistance. The detailed structure of the permalloy/Au interfaces has been probed using high-resolution cross-section transmission electron microscopy. On annealing, the Au layers interdiffuse into the permalloy layers, which leads both to rougher permalloy/Au interfaces and to "thinner" Au spacer layers. We infer that the latter results in ferromagnetic coupling of the permalloy layers, which accounts for the reduced GMR. © 1996 American Institute of Physics.
N. Thangaraj, C.J. Echer, et al.
Journal of Applied Physics
G.R. Harp, S.S.P. Parkin, et al.
Physical Review B
A. Ney, R. Rajaram, et al.
J. Supercond. Novel Magn.
S.S.P. Parkin, J.C. Scott, et al.
Physical Review B