在超薄矿薄膜中的铁电
Dillon D Fong1, G Brian Stephenson, Stephen K Streiffer
1Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
概括
在矿薄膜中的铁电力被理解为. 酸薄膜在3个单元电池下仍然具有铁电性,对设备没有内在的尺寸限制.
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
- 固态化学 固态化学
背景情况:
- 超薄矿薄膜中的铁电抑制是一个长期存在的问题.
- 了解尺寸效应对于纳米电子设备至关重要.
研究的目的:
- 研究酸薄膜中铁电的最小厚度.
- 确定温度和厚度对铁电相稳定性的影响.
主要方法:
- 同步射线X射线衍射被用来研究酸 (PbTiO3) 薄膜.
- 实验在各种温度和薄膜厚度范围内进行,直到单个单元细胞.
主要成果:
- 酸薄膜中的铁电相在室温下保持稳定,直至3个单元细胞 (1.2 nm) 的厚度.
- 在这种厚度范围内没有观察到内在铁电尺寸效应的证据.
结论:
- 这些发现挑战了酸中铁电的临界厚度的概念.
- 实际的铁电器件本质上并没有受到纳米尺度内在尺寸效应的限制.
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