Multilevel resistive switching and synaptic plasticity of nanoparticulated cobaltite oxide memristive device

Tukaram D. Dongale, Atul C. Khot, Ashkan V. Takaloo, Kyung Rock Son, Tae Geun Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Multilevel resistive switching (RS) is a key property to embrace the full potential of memristive devices for non-volatile memory and neuromorphic computing applications. In this study, we employed nanoparticulated cobaltite oxide (Co3O4) as a model material to demonstrate the multilevel RS and synaptic learning capabilities because of its multiple and stable redox state properties. The Pt/Co3O4/Pt memristive device exhibited tunable RS properties with respect to different voltages and compliance currents (CC) without the electroforming process. That is, the device showed voltage-dependent RS at a higher CC whereas CC-dependent RS was observed at lower CC. The device showed four different resistance states during endurance and retention measurements and non-volatile memory results indicated that the CC-based measurement had less variation. Besides, we investigated the basic and complex synaptic plasticity properties using the analog current-voltage characteristics of the Pt/Co3O4/Pt device. In particular, we mimicked the potentiation–depression and four-spike time-dependent plasticity (STDP) rules such as asymmetric Hebbian, asymmetric anti-Hebbian, symmetric Hebbian, and symmetric anti-Hebbian learning rules. The results of the present work indicate that the cobaltite oxide is an excellent nanomaterial for both multilevel RS and neuromorphic computing applications.

Original languageEnglish
Pages (from-to)81-91
Number of pages11
JournalJournal of Materials Science and Technology
Volume78
DOIs
Publication statusPublished - 2021 Jul 10

Keywords

  • Cobaltite oxide
  • Memristive device
  • Multilevel resistive switching
  • STDP
  • Synaptic plasticity

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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