Antiferromagnetic ordering in the conducting π-d system κ-(BEDT-TSF)2FeCl4 (where BEDT-TSF is bis(ethylenedithio)tetraselenafulvalene, C10S4Se4H8)

Hiroshi Uozaki, Takahiko Sasaki, Satoshi Endo, Naoki Toyota

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

To study the magnetic ground state in the title compound of a quasi two-dimensional charge transfer salt containing Fe3+ (S = 5/2) paramagnetic ions, we have measured the magnetic torque at 0.4 K ≤ T ≤ 4 K and H ≤ 14 T using a capacitive cantilever torque meter. The torque and magnetization data above 1 K are well scaled by the Brillouin plot with a Weiss temperature of -0.8 K. From theoretical analysis for a uniaxial antiferromagnet, anomalous torque curves below 1 K reveal that an antiferromagnetic ordering with its easy axis perpendicular to the conducting ac-plane occurs between 0.5 K and 1 K. This antiferromagnetic order coexists with the metallic state of π-electrons, indicating quite weak π-d interaction.

Original languageEnglish
Pages (from-to)2759-2762
Number of pages4
Journaljournal of the physical society of japan
Volume69
Issue number9
DOIs
Publication statusPublished - 2000 Sep

Keywords

  • Antiferromagnetic ordering
  • BETS
  • Magnetic torque
  • Organic conductor
  • κ-(BEDT-TSF)FeCl

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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