Spin dynamics of the charge-transfer phase transition of an iron mixed-valence complex observed using muon spin relaxation spectroscopy

N. Kida, M. Enomoto, I. Watanabe, T. Suzuki, N. Kojima

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Muon spin relaxation was performed to investigate the dynamic properties of electrons in the iron mixed-valence complex (n -C3 H7) 4 N [FeII FeIII (dto) 3] (dto= C2 O2 S2), which shows a charge-transfer phase transition around 120 K and a ferromagnetic transition at 7 K. The dynamic muon spin depolarization rate for (n -C3 H7) 4 N [FeII FeIII (dto) 3] in zero field exhibits an anomalous enhancement with thermal hysteresis between 60 and 140 K, which is due to the charge-transfer phase transition. The nature of the charge transfer is the oscillation of electrons between FeII and FeIII sites, producing a dynamically fluctuating internal field at the muon site with a frequency of about 0.1 MHz.

Original languageEnglish
Article number144427
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number14
Publication statusPublished - 2008 Apr 25


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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