High-pressure synthesis, crystal structure, and magnetic properties of Mn1-xTxGe4 (T: Co, Fe)

H. Takizawa, K. Yamazaki, T. Endo, M. Shimada

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Mn1-xTxGe4 (T: Co, Fe) solid solution was synthesized at 6 GPa and 650-750°C using a belt-type high-pressure apparatus. The crystal structure of the Mn1-xTxGe4 solid solution is related to the β-NiHg4 type. The following structural changes were observed in the Mn1-xCoxGe4 system: tetragonal (x = 0) to orthorhombic (0 < x < 0.2) and orthorhombic to pseudotetragonal (0.2 ≦ x ≦ 0.4). Similar structural changes were also observed at 0 < x < 0.4 (tetra. → ortho.) and x = 0.4 (ortho. → pseudotetra.) in the Mn1-xFexGe4 system. These results indicate that the structural changes in Mn1-xTxGe4 strongly depend on the average valence electron number of the transition metal atoms. Mn1-xTxGe4 solid solutions are itinerant electron ferromagnets and the Curie temperature decreases linearly with decreasing unit-cell volume.

Original languageEnglish
Pages (from-to)428-433
Number of pages6
JournalJournal of Solid State Chemistry
Volume105
Issue number2
DOIs
Publication statusPublished - 1993 Aug

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'High-pressure synthesis, crystal structure, and magnetic properties of Mn<sub>1-x</sub>T<sub>x</sub>Ge<sub>4</sub> (T: Co, Fe)'. Together they form a unique fingerprint.

Cite this