Ferromagnetic ordering in ThSi2 type CeAu0.28Ge1.72

C. Peter Sebastian, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The compound CeAu0.28Ge1.72 crystallizes in the ThSi2 structure type in the tetragonal space group I41/amd with lattice parameters a=b=4.2415(6) Å c=14.640(3) Å. CeAu0.28Ge1.72 is a polar intermetallic compound having a three-dimensional Ge/Au polyanion sub-network filled with Ce atoms. The magnetic susceptibility data show Curie-Weiss law behavior above 50 K. The compound orders ferromagnetically at ∼8 K with estimated magnetic moment of 2.48 μB/Ce. The ferromagnetic ordering is confirmed by the heat capacity data which show a rise at ∼8 K. The electronic specific heat coefficient (γ) value obtained from the paramagnetic temperature range 15-25 K is∼124(5) mJ/ mol K2. The entropy change due to the ferromagnetic transition is ∼4.2 J/mol K which is appreciably reduced compared to the value of R ln(2) expected for a crystal-field-split doublet ground state and/or Kondo exchange interactions.

Original languageEnglish
Pages (from-to)878-882
Number of pages5
JournalJournal of Solid State Chemistry
Volume183
Issue number4
DOIs
Publication statusPublished - Apr 2010

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Specific heat
specific heat
Curie-Weiss law
Exchange interactions
Magnetic moments
Magnetic susceptibility
Ground state
Lattice constants
Intermetallics
crystal field theory
intermetallics
lattice parameters
Entropy
magnetic moments
entropy
magnetic permeability
Atoms
Crystals
ground state
coefficients

Keywords

  • Ferromagnetism
  • Kondo behavior
  • ThSi type structure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry

Cite this

Ferromagnetic ordering in ThSi2 type CeAu0.28Ge1.72. / Sebastian, C. Peter; Kanatzidis, Mercouri G.

In: Journal of Solid State Chemistry, Vol. 183, No. 4, 04.2010, p. 878-882.

Research output: Contribution to journalArticle

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AB - The compound CeAu0.28Ge1.72 crystallizes in the ThSi2 structure type in the tetragonal space group I41/amd with lattice parameters a=b=4.2415(6) Å c=14.640(3) Å. CeAu0.28Ge1.72 is a polar intermetallic compound having a three-dimensional Ge/Au polyanion sub-network filled with Ce atoms. The magnetic susceptibility data show Curie-Weiss law behavior above 50 K. The compound orders ferromagnetically at ∼8 K with estimated magnetic moment of 2.48 μB/Ce. The ferromagnetic ordering is confirmed by the heat capacity data which show a rise at ∼8 K. The electronic specific heat coefficient (γ) value obtained from the paramagnetic temperature range 15-25 K is∼124(5) mJ/ mol K2. The entropy change due to the ferromagnetic transition is ∼4.2 J/mol K which is appreciably reduced compared to the value of R ln(2) expected for a crystal-field-split doublet ground state and/or Kondo exchange interactions.

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