Complementary charge trapping and ionic migration in resistive switching of rare-earth manganite TbMnO3

Yimin Cui, Haiyang Peng, Shuxiang Wu, Rongming Wang*, Tao Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

Perovskite rare-earth manganites like TbMnO3 exhibit rich magnetic and electric phases, providing opportunities for next-generation multifunctional devices. Here, we report the nonvolatile bipolar switching of resistance and capacitance in TbMnO3 thin films grown on conducting Nb:SrTiO3 substrates. The device shows an ON/OFF resistance ratio of ∼1 × 104, and the resistive switching is accompanied by a frequency-dependent capacitance switching. Detailed analysis of the conduction mechanisms reveals that the migration of oxygen vacancies and the charge trapping/detrapping at the heterojunction interface play important and complementary roles in the switching behaviors. Our results suggest that both electronic and ionic processes should be considered in order to elucidate the conduction mechanisms and the switching behaviors in such heterostructures made of complex oxides.

Original languageEnglish (US)
Pages (from-to)1213-1217
Number of pages5
JournalACS Applied Materials and Interfaces
Volume5
Issue number4
DOIs
StatePublished - Mar 11 2013

Keywords

  • TbMnO
  • capacitance switching
  • charge trapping
  • ionic migration
  • oxygen vacancies
  • resistive switching

ASJC Scopus subject areas

  • Materials Science(all)

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