%0 Journal Article
%K decomposition
%K nickel alloys
%K Ferromagnetism
%K Iron alloys
%K Magnetic properties
%K Phase interfaces
%K Magnetic field effects
%K Thermal effects
%K Deformation
%K Electric conductivity of solids
%K Metallic superlattices
%K Metallographic microstructure
%K Copper nickel iron alloy
%K Giant magnetoresistance
%K Spin dependent scattering
%K Copper alloys
%A L.H Chen
%A T.H Tiefel
%A S Jin
%A Ramamoorthy Ramesh
%B Journal of Materials Research
%D 1994
%G eng
%P 1134-1139
%R 10.1557/JMR.1994.1134
%T Magnetoresistance in a deformed Cu-Ni-Fe alloy with ultrafine multilayer structure
%V 9
%X The creation of a giant magnetoresistance (GMR) effect in a spinodally decomposed and deformed Cu-20% Ni-20% Fe alloy is reported. The alloy is processed to contain a locally multilayered superlattice-like structure with alternating ferromagnetic and nonmagnetic layers with a size scale of 10–20 A. The microstructural modification produced a dramatic improvement in room-temperature magnetoresistance ratio from —0.6 to —5%. The observed magnetoresistance is most likely related to the spin-dependent scattering at the two-phase interface and in the ferromagnetic phase, although the exact mechanism involved may be qualitatively different from the usual GMR picture. A rather unusual temperature-dependence of magnetoresistance ratio, i.e., the room-temperature value being greater than that at 4.2 K, was found. © 1994, Materials Research Society. All rights reserved.