Metamagnetic transition and its related magnetocapacitance effect in phthalocyanine-molecular conductor exhibiting giant magnetoresistance

Noriaki Hanasaki, Takuma Tateishi, Hiroyuki Tajima, Motoi Kimata, Masashi Tokunaga, Masaki Matsuda, Akinori Kanda, Hiroshi Murakawa, Toshio Naito, Tamotsu Inabe

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The magnetization and transport properties of iron-phthalocyanine molecular conductors are investigated under pulsed high magnetic fields up to 55 T. The metamagnetic transition is observed at approximately 14 T, where conductivity is enhanced. Below this transition, the tan S (= ∈"/∈') in the dielectric constants shows a monotonic decrease as the magnetic field strength increases, indicating that the magnetic field stabilizes the charge order. On the verge of this transition, the dielectric constants show a hysteresis below the weak-ferromagnetic transition temperature (6 K), suggesting that the π-electron charge order contributes to the weak ferromagnetism.

Original languageEnglish
Article number094713
Journaljournal of the physical society of japan
Volume82
Issue number9
DOIs
Publication statusPublished - 2013 Sep
Externally publishedYes

Keywords

  • Charge disproportionation
  • Giant magnetoresistance
  • Metamagnetic transition
  • Phthalocyanine

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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