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Published on: July 1, 2013
纳米级铁电:在氧化物薄膜和异构结构中的局部两极分化
C H Ahn1, K M Rabe, J-M Triscone
1Departments of Applied Physics and Physics, Yale University, Post Office Box 208284, New Haven, CT 06520-8284, USA. charles.ahn@yale.edu
Science (New York, N.Y.)
|January 24, 2004
概括
铁电氧化物材料显示出对电子产品的前景. 合成技术的进步使原子水平的控制成为可能,创造了新的多功能设备和探索纳米尺度现象.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 铁电氧化物材料,特别是矿,由于其可切换的电极化,长期以来一直具有存储内存和微电子的潜力.
- 从历史上看,材料加工的挑战限制了铁电的实际应用.
- 复杂氧化物合成的近期进展彻底改变了该领域,使得在创造人工氧化物结构时能够以原子级的精度实现.
研究的目的:
- 突出最近铁电氧化物材料合成的突破及其对设备应用的影响.
- 讨论 ferroelectrics 与其他功能性氧化物用于多功能材料的整合.
- 探索纳米级新物理现象的出现和先进的表征技术.
主要方法:
- 复杂氧化物的先进合成技术,实现原子级精度.
- 不同结构制造,将铁电薄膜与其他功能性氧化物 (例如超导体,磁性氧化物) 结合起来.
- 使用先进的局部探测器在原子尺度上进行实时空间特征和操纵.
- 第一个原则是理论计算,以了解结构与属性之间的关系.
主要成果:
- 现在可以生长高质量的铁电薄膜,从而实现新的设备功能.
- 多功能材料和设备是通过将铁电与超导体和磁性氧化物结合而实现的.
- 纳米尺寸导致铁电异构结构中的新奇物理现象.
- 原子尺度的表征和理论在理解和控制这些材料方面发挥着至关重要的作用.
结论:
- 合成的突破释放了铁电氧化物在先进应用中的潜力.
- 氧化物异构结构的精确工程使得创建多功能设备成为可能.
- 纳米规模的探索和先进的表征是发现新物理和开发下一代电子元件的关键.
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