Microstructural characterization of granular CuCo rapidly solidified ribbons

F. Vinai, P. Tiberto, A. Deriu, F. Malizia, M. Vittori-Antisari, M. Angiolini, J.S. Pedersen

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Abstract

The microstructure and magnetic properties of granular CuCo alloys obtained by planar flow casting in controlled atmosphere have been characterised by transmission electron microscopy (TEM), small angle neutron scattering (SANS), and magnetisation measurements. The magnetoresistance measurements have been performed using the classical dc four probe method. The influence of quenching rate on the structural and magnetic properties has been investigated. The TEM and SANS data indicate a marked change in the morphology for samples obtained with wheel velocities greater than 19 m/s, and in the same samples a significant decrease of the magnetic moment is observed. The as cast samples, as well as the ones subjected to isothermal annealing at 713 K or to Joule heating up 7 A, show little variation of their microstructure. Treatments with 10 A Joule currents induce the formation of well defined Co precipitates. The effect of cold lamination on the giant magnetoresistance properties has also been investigated.
Original languageEnglish
Pages (from-to)339 - 344
Number of pages6
JournalMaterials Science Forum
Volume269-272
Issue numberPART 1
Publication statusPublished - 1998
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Vinai, F., Tiberto, P., Deriu, A., Malizia, F., Vittori-Antisari, M., Angiolini, M., & Pedersen, J. S. (1998). Microstructural characterization of granular CuCo rapidly solidified ribbons. Materials Science Forum, 269-272(PART 1), 339 - 344.