Robust filament formation via defect engineering in Mn: SrTiO3 for oxygen vacancy driven RRAM device

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-09-29 DOI:10.1016/j.matlet.2025.139571

Durairaj Murugan , Gowtham Velpandi , Ranjith Ramadurai

引用次数: 0

Abstract

This study investigates the resistive switching behavior of a Pt/Sr_0.8Mn_0.2TiO_3±δ/Pt device with the thicknesses varying from 25 to 850 nm. The substitution of aliovalent dopants like Mn in SrTiO₃ facilitates the formation of n-type and p-type defects simultaneously. The filament formation via defect migration is expected to originate from both the positive and negatively biased electrodes and make a robust connection between the resistive states. The device exhibits stable switching behavior over 10³ cycles and a consistent on/off ratio of 10². The retention tests performed on 25 nm and higher thicknesses (up to ∼850 nm) of Mn: STO films suggest that it is a promising candidate for resistive switching devices.

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通过缺陷工程在Mn: SrTiO3中形成氧空位驱动RRAM器件的坚固灯丝

本文研究了厚度为25 ~ 850 nm的Pt/Sr0.8Mn0.2TiO3±δ/Pt器件的电阻开关行为。在SrTiO3中取代同价掺杂剂如Mn，有利于同时形成n型和p型缺陷。通过缺陷迁移形成的灯丝预计来自正负偏置电极，并在电阻状态之间建立牢固的连接。该器件在103个周期内表现出稳定的开关行为和102的一致开/关比。在25 nm和更高厚度（高达~ 850 nm）的Mn: STO薄膜上进行的保留测试表明，它是电阻开关器件的有前途的候选者。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive