Nguyen Hai Hung, Ta Hanh Kieu Thi, Park Sungkyun, Phan Thang Bach, Pham Ngoc Kim
Faculty of Materials Science and Technology, University of Science Vietnam
Vietnam National University Ho Chi Minh City Vietnam.
RSC Adv. 2020 Mar 31;10(22):12900-12907. doi: 10.1039/c9ra10101b. eCollection 2020 Mar 30.
In this study, the memory device of iron oxide (IO) nanoparticles (NPs) embedded in polyvinyl alcohol (PVA) demonstrates the bipolar resistive switching characteristics under an external electric field. The phase and magnetic properties of iron oxide nanoparticles change corresponding to its resistive states. At the high resistance state (HRS) of device, iron oxide nanoparticles are primarily in FeO phase and the ferromagnetism behavior is observed. In contrast, the iron oxide nanoparticles clustered by the bridging oxygen vacancies lead to mainly FeO phase and no hysteresis magnetic curve is observed at the low resistance state (LRS) of device. The results reveal that oxygen vacancies/ions in nanoparticles notably influence the resistance and magnetic behavior of nanocomposite thin films. Our study indicated that the magnetic NPs is high potential of multi-dimensional storage fields.
在本研究中，嵌入聚乙烯醇（PVA）中的氧化铁（IO）纳米颗粒（NPs）存储器件在外部电场下表现出双极电阻开关特性。氧化铁纳米颗粒的相和磁性特性随其电阻状态而变化。在器件的高电阻状态（HRS）下，氧化铁纳米颗粒主要处于FeO相，并观察到铁磁行为。相反，由桥接氧空位聚集的氧化铁纳米颗粒在器件的低电阻状态（LRS）下主要导致FeO相，且未观察到磁滞曲线。结果表明，纳米颗粒中的氧空位/离子显著影响纳米复合薄膜的电阻和磁性行为。我们的研究表明，磁性纳米颗粒在多维存储领域具有很高的潜力。
