G. Güntherodt, B. Hillebrands, et al.
Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
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.
G. Güntherodt, B. Hillebrands, et al.
Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
U. Rüdiger, J. Yu, et al.
Applied Physics Letters
G. Salis, R. Wang, et al.
Applied Physics Letters
B.D. Schrag, A. Anguelouch, et al.
Journal of Applied Physics