Giant magnetoresistive properties of FexAu100 x alloys produced by mechanical alloying

SOCOLOVSKY, L. M.; SÁNCHEZ, F. H.; SHINGU, P. H.

Journal of Magnetism and Magnetic Materials

Elsevier

Lugar: Holanda; Año: 2001 vol. 226 p. 736 - 736

0304-8853

The Fe Au alloys were produced for the first time by mechanical alloying. Resistance of samples with iron concentrations of x = 15, 20, 25, and 30 at% were measured at 77 K under an applied  field of 14 kOe. A maximum inmagnetoresistive ratio ( / ) of 3.5% was obtained for Fe Au . Samples were annealed in order to enhance magnetoresistive properties. These samples exhibit larger ratios, primarily due to the elimination of defects. X-raydi!raction Mossbauer spectroscopy and magnetoresistance measurements were performed, in order to correlate bulkand hyperfine magnetic properties with crystalline structure. X-ray difractograms show an FCC structure, with noevidence for a BCC one