Magnetism in FeCl2 at high pressures

W. M. Xu, M. P. Pasternak

Research output: Contribution to journalArticlepeer-review

Abstract

Anhydrous FeCl2 has been studied by 57Fe Mössbauer effect up to 61 GPa and at 5 < T < 300 K using diamond-anvil-cells. In the 3.5-31 GPa range an average hyperfine field of ∼1.2 T is observed, attributed to mutual cancellation of Fermi-contact and orbital terms. At P ≥ 34 GPa the orbital term is abruptly quenched resulting in enhanced hyperfine field. At P > 42 GPa the onset of a diamagnetic phase is observed, signifying a total collapse of magnetism at P > 61 GPa.

Original languageEnglish
Pages (from-to)175-181
Number of pages7
JournalHyperfine Interactions
Volume144-145
Issue number1-4
DOIs
StatePublished - 2002

Keywords

  • Ferrous halide
  • High-pressure
  • Magnetism
  • Mott transition
  • Mössbauer spectroscopy
  • Spin crossover

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