Substitution in Ce2TSi3 Intermetallic Compositions with T = (Cr, Mn, Fe, Co, or Ni) x (Pd or Au) 1-x.

Abstract

Alloys of composition Ce2(3d/T)Si3, with '3d' one of Cr, Mn, Fe, Co or Ni and 'T' being Pd or Au, were separated and examined by powder x-ray diffraction. Select single phase compositions were further examined by magnetic susceptibility, by resistivity for the Pd and Co end-members and by specific heat for Ce2CoSi3. For compounds not containing cobalt, effective cerium moments consistent with trivalent cerium were observed. A re-examination of the AlB2 related structure of Ce2CoSi3 by single crystal methods revealed ordering of cobalt within the CoSi3 hexagonal layer. Magnetic susceptibility, resistance and specific heat measurements suggest valence fluctuation behavior of the cerium in Ce2CoSi3. A return to trivalent cerium magnetic behavior occurs on increasing palladium or gold substitution for cobalt.

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Document Details

Document Type
Technical Report
Publication Date
Jul 10, 1996
Accession Number
ADA310878

Entities

Organizations

  • Cornell University Department of Chemistry and Chemical Biology

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Chemistry
  • Crystals
  • Data Sets
  • Diffraction
  • Diffractometers
  • Elements
  • Ground State
  • Low Temperature
  • Materials
  • Measurement
  • Military Research
  • Palladium
  • Single Crystals
  • Solid Solutions
  • Specific Heat
  • Transition Metals
  • X Rays

Readers

  • Materials Science and Engineering.
  • Powder metallurgy of Titanium alloys.