Influence of the grain size on the magnetic properties of ball milled Fe90W10

M. Kis-Varga, D. L. Beke, L. Daróczi

Research output: Contribution to journalConference article

Abstract

Fe(W) nanocrystalline solid solutions with 10 at% W content have been produced by ball milling of elemental Fe and W powders. The milling was performed for 450 hours in a vibrating mill using hardened steel vial and ball. The structural study by X-ray diffraction showed the formation of b.c.c. solid solution of W in Fe during the first 100 hours period of milling and the decrease of grain size to cca. 9 nm within the same time. Magnetization curves up to 1 T field have been measured at room temperature by a vibration magnetometer. The saturation magnetization showed no significant change by decreasing grain size, which is in good agreement with earlier published observations on other nanocrystalline magnetic materials. The coercivity has a maximum at grain size of about 16 nm and a steep decrease at smaller grain sizes. The latter is probably due to the decreased anisotropy constant, which leads to a sharp decrease in coercivity according to the random anisotropy model.

Original languageEnglish
Pages (from-to)II/-
JournalMaterials Science Forum
Volume343
Publication statusPublished - Jan 1 2000
EventISMANAM-99: The International Symposium on Metastable, Mechanically Alloyed and Nanocrystalline Materials - Dresden, Ger
Duration: Aug 30 1999Sep 3 1999

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ASJC Scopus subject areas

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

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