Electric-field breakdown of the insulating charge-ordered state in LuFe2O4 thin films

Kohei Fujiwara, Tatsuya Hori, Hidekazu Tanaka

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have studied the dielectric breakdown of the insulating charge-ordered state and the associated current switching phenomenon in layered ferrite LuFe2O4. To elucidate the correlation between the ordering pattern and current switching behaviour, we synthesized highly c-axis oriented thin films by pulsed-laser deposition. An enhanced switching effect was achieved in the three-dimensional charge-ordered phase below ∼310 K, but not in the high-temperature two-dimensional phase. High-field transport measurements revealed that collective depinning of localized charge carriers is essential to induce switching. The lack of collective charge motion is proposed as the origin of the switching suppression in the two-dimensional phase.

Original languageEnglish
Article number155108
JournalJournal of Physics D: Applied Physics
Volume46
Issue number15
DOIs
Publication statusPublished - 2013 Apr 17
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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