Negative magnetoresistance in organic ionic semi conductor: TTFCOONH 3Ph

Yuka Kobayashi, Satoshi Sumi, Takeshi Terauchi, Hideo Iwai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


TFFCOONI-I3Ph is a recently synthesized open-shell ionic semiconductor, the electronic state of which differs from that of typical organic closed-shell semiconductors. Magnetotransport properties were examined using a single-crystal sample, and found to exhibit small negative magnetoresistance (-02%) for 9 T at room temperaturet). The magnetization curve verifies the existence of a ferromagnetic (35%) and a paramagnetic (65%) component at it, which is very similar to that of diluted magnetic semiconductors, despite the absence of any ferromagnetic metal elements. Electron spin resonance reveals weak localization of paramagnetic molecular spins, and moreover, ferromagnetic resonance confirms the existence of magnetically ordered spins in addition to the paramagnetic ones. The origin of the spin-polarized transport is discussed.

Original languageEnglish
Pages (from-to)27-32
Number of pages6
JournalSolid State Communications
Publication statusPublished - 2013
Externally publishedYes


  • A. Organic ionic semiconductor
  • D. Ferromagnetism
  • D. Magnetotransport

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry


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