Giant magnetoresistance of melt-spun Cu-Ni-Fe alloys with spinodally-decomposed structure

Giant magnetoresistance (MR) was studied in alloys of composition Cu80Fe10Ni10, Cu80Fe15Ni5, Cu80Fe5Ni15, and Cu80Fe20, produced by melt spinning and annealed in the temperature range 300–600 °C. Materials were characterized by Mössbauer spectroscopy at several temperatures. At both 78 and 300 K, spectra for all CuFeNi compositions showed a singlet associated with superparamagnetic Fe nanoparticles, but at 4.2 K the sextet characteristic of ferromagnetic Fe was visible. From the hyperfine field reduction we estimated the radius of the Fe particles. Magnetization data for Cu80Fe10Ni10 at 300 K were compared with a model which features a log-normal distribution of noninteracting superparamagnetic particles. Thus the mean magnetic moment and the particle density were determined. The magnetoresistance ratio MR was compared to a model which considers bulk and interface scattering.

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Giant magnetoresistance of melt-spun Cu-Ni-Fe alloys with spinodally-decomposed structure

Cited by 3 publications

References 8 publications

Structure and magnetic properties of spinodal decomposed Cu60Ni20Fe10Co10 ribbons with hard magnetism

Structure and magnetic properties of spinodal decomposed Cu60Ni20Fe10Co10 ribbons with hard magnetism

Magnetization and giant magnetoresistance in melt–spun and annealed CuFeNi alloys

Giant magnetoresistance in granular CuFeNi alloys

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