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Creation of bulk, superlatticelike structure and giant magnetoresistance effect in a deformed Cu-Ni-Fe alloy (1994)

Chen, L. H. ; Jin, S. ; Tiefel, T. H. ; [weitere]

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 64 (1994), S. 1039-1041

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Details

ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: A spinodally decomposed Cu-20 Ni-20 Fe alloy containing ∼500 A(ring) size ferromagnetic particles was uniaxially deformed to create a locally multilayered, superlatticelike structure with alternating ferromagnetic and nonmagnetic layers. When the size scale of each layer was made to be small, ∼15 A(ring) thick, a dramatic improvement in room-temperature magnetoresistance ratio from ∼0.6 to ∼5% was obtained. An abnormal temperature dependence of magnetoresistance ratio, i.e., the room-temperature value being greater than that at 4.2 K, was found. The observed giant magnetoresistance behavior could be explained in terms of the field-induced decrease in electron scattering in a nearly superparamagnetic material although the spin-dependent scattering at the two-phase interface and in the ferromagnetic phase may also be a contributing factor.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.110963

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