Crystal structure, magnetic properties and bonding analysis of M3Pt23Ge11 (M=Ca, Sr, Ba and Eu)

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Abstract

The properties of Pt-based materials can be intriguing due to the importance of spin-orbit coupling for Pt. Herein, we report four new phases with formulas M3Pt23Ge11 (M ​= ​Ca, Sr, Ba and Eu), which adopt the same structure type as Ce3Pt23Si11. Magnetic susceptibility measurements indicate that none of the phases is superconducting above 1.8 ​K, while for Eu3Pt23Ge11 ferromagnetic ordering is observed at ~ 3 ​K. The low Curie temperature for that material compared to that of Eu3Pt23Si11 may be due to its larger Eu–Eu distance. One potential factor that destabilizes the structure of other rare-earth based M3Pt23Ge11 is demonstrated through COHP calculations.

Original languageEnglish (US)
Article number122486
JournalJournal of Solid State Chemistry
Volume303
DOIs
StatePublished - Nov 2021

All Science Journal Classification (ASJC) codes

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

Keywords

  • Bonding analysis
  • Ferromagnetism
  • Pt-rich materials

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