Characterization and electronic structure calculations of the antiferromagnetic insulator Ca3 FeRh O6

Volker Eyert*, Udo Schwingenschloegl, Raymond Frésard, Antoine Maignan, Christine Martin, Ninh Nguyen, Christian Hackenberger, Thilo Kopp

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We investigate the antiferromagnetic insulating nature of Ca3 FeRh O6 both experimentally and theoretically. Susceptibility measurements reveal a Néel temperature of TN 20 K and an effective magnetic moment of 5.3 μB fu. Mössbauer spectroscopy strongly suggests that the Fe ions, located at trigonal prismatic sites, are in a 3+ high-spin state. Transport measurements display a simple Arrhenius law, with an activation energy of ∼0.2 eV. The experimental results are interpreted with local spin-density approximation band-structure calculations, which confirm the Fe3+ state, the high-spin versus low-spin scenario, the antiferromagnetic ordering, and the value for the activation energy.

Original languageEnglish (US)
Article number115105
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number11
DOIs
StatePublished - Mar 7 2007

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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