在金属矿上低温的石墨-表层La替代BiFeO3
Sajid Husain1, Isaac Harris2, Guanhui Gao3
1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA. shusain@lbl.gov.
Nature communications
|January 11, 2024
概括
在450°C时实现了替代 bismuth ferrite (La-BiFeO3) 薄膜的低温生长,使磁电逻辑内存应用的-CMOS集成成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术纳米技术
背景情况:
- 铁矿 (BiFeO3) 是磁电自旋轨道合逻辑内存设备的关键材料.
- 长轴BiFeO3沉积通常需要高温 (650-800°C),阻碍了-CMOS集成.
研究的目的:
- 为BiFeO3开发一种与-CMOS集成相兼容的低温沉积方法.
- 为了研究低温培养的La-BiFeO3.3的结构和电气特性.
主要方法:
- 在450°C的 BaPb0.75Bi0.25O3 电极上,替代的 BiFeO3 (La-BiFeO3) 的表轴生长.
- 原子分辨率STEM成像和矢量映射用于极化分析.
- 电气特征包括电流-电压,脉冲切换,疲劳和保留测量.
主要成果:
- 尽管有格子不匹配,但仍然可以实现具有[001]纹理的有序的La-BiFeO3薄膜.
- 在低温培养的La-BiFeO3.3中证实了短距离的偏振顺序.
- 电气性能模仿了高温培养的BiFeO3.3的电气性能.
结论:
- 在复杂氧化物缓冲层上,La-BiFeO3的低温表轴生长是可行的.
- 这种方法促进了多铁材料与CMOS技术的潜在整合.
- 打开了先进的逻辑内存设备的道路.
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