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Applied Physics Letters -- June 20, 1994 -- Volume 64, Issue 25, pp. 3500-3502

Giant magnetoresistance in Fe/Cr superlattices with very thin Fe layers

R. Schad, C. D. Potter, P. Beliën, G. Verbanck, V. V. Moshchalkov, and Y. Bruynseraede

Laboratorium voor Vaste-Stoffysika en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

(Received 28 February 1994; accepted 19 April 1994)

Carefully tailored Fe/Cr epitaxial superlattices with extremely thin Fe layers have been grown on MgO(100) by molecular beam epitaxy. The low-angle x-ray spectra reveal the presence of sharp interfaces down to an Fe layer thickness of a few monolayers. An [Fe(4.5 Å)/Cr(12 Å)]₅₀ superlattice shows a 220% magnetoresistance at 1.5 K, and a saturation field of 110 kOe. A further decrease of the Fe layer thickness produces a drastic decrease in the magnetoresistance. Applied Physics Letters is copyrighted by The American Institute of Physics.

DOI: 10.1063/1.111253
PACS: 73.50.Jt, 73.61.At, 75.30.Et, 75.70.Fr        Additional Information

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