Kondo effect in 3d-host ferromagnetic Sm1-xCexMn2Ge2

G. Liang, Q. Yao, H. Xi, K. Mochizuki, J. T. Markert, Mark Croft

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Abstract

Lattice, Ce L3-edge, magnetic susceptibility, and electrical resistivity results on polycrystalline Sm1-xCexMn2Ge2 (0 ≤ x ≤ 1) compound series are presented. The lattice parameters a and c increase almost linearly with the increase of Ce concentration x. The Ce-L3 X-ray absorption spectra indicate that the Ce in this series is nearly trivalent, and Ce valence decreases slightly with the increase of Ce concentration x. Magnetic susceptibility results indicate that the antiferromagnetic (AF) phase in the re-entrant ferromagnetic compound, SmMn2Ge2, is completely destroyed by merely 1.1% Ce for Sm substitution. For x > 0.011, only ferromagnetic (FM) phases exist below room temperature. It is found that in these materials Ce Kondo scattering coexists with the 3d-host FM fields and is also effectively weakened by such fields.

Original languageEnglish (US)
Pages (from-to)8-13
Number of pages6
JournalJournal of Alloys and Compounds
Volume414
Issue number1-2
DOIs
Publication statusPublished - Apr 13 2006

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Keywords

  • Electrical transport
  • Kondo effect
  • Magnetic measurements
  • Magnetically ordered materials
  • Rare-earth compounds

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