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Journal of Applied Physics -- April 15, 1991 -- Volume 69, Issue 8, pp. 4789-4791

Layered magnetic structures: Antiferromagnetic-type interlayer coupling and magnetoresistance due to antiparallel alignment

P. Grünberg, S. Demokritov, A. Fuss, M. Vohl, and J. A. Wolf

Forschungszentrum Jülich, IFF, Postfach 1913, D-5170 Jülich, Federal Republic of Germany

Layered Fe/Cr structures are known to display antiferromagnetic-type interlayer coupling and a new magnetoresistance (MR) effect due to antiparallel magnetization alignment. The strength of the coupling is found to be similar in multilayered structures and in double layers. The oscillatory behavior of the coupling, previously found by Parkin, More, and Roche [Phys. Rev. Lett. 64, 2304 (1990)] on sputtered polycrystalline samples, is here confirmed for epitaxial samples, obtained by thermal evaporation. The new MR effect is interpreted as due to a spin-dependent scattering of the electrons at the Fe-Cr interfaces. The investigations have been extended to Fe/V, Fe/Mn, Fe/Cu, Co/Au, Co/Cr, and Co/Cu structures where the antiparallel alignment of the ferromagnetic layers is obtained via hysteresis effects. A MR effect due to antiparallel alignment, which is strong for Co/Au and Co/Cu but weak in the other cases, has been found. Journal of Applied Physics is copyrighted by The American Institute of Physics.

doi:10.1063/1.348230
PACS: 75.70.-i, 73.50.Jt        Additional Information

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