Analog bipolar resistive switching in Sm doped BaTiO3 thin films for Opto-memristor application

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-03-18 DOI:10.1016/j.matchemphys.2025.130764

Vaishali Chandmare , Parveen Sheoran , Kusum Kumari , Atul Thakre , Ashok Kumar , Brahim Dkhil , Hitesh Borkar

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Abstract

Ferroelectric thin films are proving their potential for non-volatile memory applications owing to their inherent polarization. The modulation in the conductance of BaTiO₃ by doping with Sm³⁺ ion under dark and illuminated conditions has been studied in this work. Polycrystalline thin films of pristine BaTiO₃ (BTO) and Sm-doped BaTiO₃ (SBTO) were fabricated on FTO coated glass substrates using the Sol-gel spin coating route. BTO and SBTO thin films exhibited a tetragonal phase and a thickness of 500 nm. The current-voltage (I–V) data of the Al/SBTO/FTO device show analog bipolar resistive switching under dark and illuminated conditions. The devices have a R_ON/R_OFF ratio of 10 and charge retention up to 10³ s. The resistive Switching performance of the Al/SBTO/FTO device improved under the illumination of UV light (λ = 395 nm and power of 10 mW/cm²), which makes the device suitable for an Opto-memristor. The long-term potentiation (LTP) and long-term depression (LTD) characteristics of the Al/SBTO/FTO device indicate more linear behaviour than the Al/BTO/FTO device in both dark and illuminated conditions. Thus, Al/SBTO/FTO devices can be useful in non-volatile resistive random-access memory (RRAM).

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.