Cluster size from X-ray diffraction and magnetic measurements in Fe-Ag multilayers and FeZrBCu nanocrystals

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Characteristic sizes (D) were determined by magnetic measurements for two quite different types of granular system: (1) two Fe-Ag discontinuous multilayers with the overall composition of Fe5Ag95 and Fe10Ag90 (D ∼1.8 nm); (2) 10% nanocrystalline (nc) and fully nc-Fe80Zr7B12Cu1ribbons (D ∼ 7 and 12 nm). X-ray diffraction could not reveal any inhomogeneity of D ∼ 1.8 nm for the Fe-Ag samples. In contrast, good agreement was obtained between the cluster size determined by X-ray and magnetic methods for both nc-Fe80Zr7B12Cu1 samples. The experimental results for the Fe-Ag alloys can be reasonably explained assuming that the magnetic clusters consist of an Fe-Ag alloy phase with above 50% Ag content embedded in a matrix of an Fe-Ag alloy phase containing Ag over 95 at %. The granules in the 10% nc-Fe80Zr7B12Cu1 sample show superparamagnetic behaviour even below the Curie temperature of the amorphous residual matrix, indicating a weak coupling between the bcc granules and the amorphous residual matrix.

Original languageEnglish
Pages (from-to)505-512
Number of pages8
JournalMaterials Science Forum
Volume360-362
DOIs
Publication statusPublished - Jan 1 2001
EventMetastable, Mechanically Alloyed and Nanocrystalline Materials (ISMANAM 2000) - Oxford, United Kingdom
Duration: Jul 9 2000Jul 14 2000

Keywords

  • Cluster size
  • Fe-Ag multilayers
  • Fe-Zr based nanocrystals
  • Magnetic properties
  • Superparamagnetism
  • X-ray diffraction

ASJC Scopus subject areas

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

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