α-Fe2O3-based artificial synaptic RRAM device for pattern recognition using artificial neural networks

Jammalamadaka, S Narayana (2023) α-Fe2O3-based artificial synaptic RRAM device for pattern recognition using artificial neural networks. Nanotechnology, 34 (26). p. 265703. ISSN 0957-4484

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Abstract

We report on the α -Fe2O3-based artificial synaptic resistive random access memory device, which is a promising candidate for artificial neural networks (ANN) to recognize the images. The device consists of a structure Ag/α-Fe2O3/FTO and exhibits non-volatility with analog resistive switching characteristics. We successfully demonstrated synaptic learning rules such as long-term potentiation, long-term depression, and spike time-dependent plasticity. In addition, we also presented off-chip training to obtain good accuracy by backpropagation algorithm considering the synaptic weights obtained from α-Fe2O3 based artificial synaptic device. The proposed α-Fe2O3-based device was tested with the FMNIST and MNIST datasets and obtained a high pattern recognition accuracy of 88.06% and 97.6% test accuracy respectively. Such a high pattern recognition accuracy is attributed to the combination of the synaptic device performance as well as the novel weight mapping strategy used in the present work. Therefore, the ideal device characteristics and high ANN performance showed that the fabricated device can be useful for practical ANN implementation.

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IITH Creators:

IITH Creators	ORCiD
Jammalamadaka, S Narayana	https://orcid.org/0000-0001-9235-7012

Item Type:

Article

Uncontrolled Keywords:

artificial neural networks; depression; memristor device; potentiation; RRAM; spike timedependent plasticity; Hematite; Memristors; Neurons; Pattern recognition; RRAM; Depression; Memristor; Memristor device; Nonvolatility; Pattern Recognition accuracies; Potentiation; Random access memory; Resistive switching; Spike timedependent plasticity; Switching characteristics; Neural networks

Subjects:

Physics
Physics > Modern physics

Divisions:

Department of Physics

Depositing User:

Mr Nigam Prasad Bisoyi

Date Deposited:

06 Jan 2024 10:41

Last Modified:

06 Jan 2024 10:41

URI:

http://raiithold.iith.ac.in/id/eprint/11782