在DyMnO纳米晶体中电场诱导的域结构的成像
Mansoor A Najeeb1, Robbie Morrison2, Ahmed H Mokhtar2
1Department of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK. m.nellikkal@soton.ac.uk.
Discover nano
|December 15, 2024
概括
研究人员使用3D BCDI.使用dysprosium manganite纳米晶体研究了多铁域壁. 发现 +3 V 的电场值可以克服固定效应,并使域壁运动.
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:
- 多铁性材料结合了铁电和铁磁性质,用于先进的应用.
- 域和域墙是多铁材料的关键特征,影响它们的行为.
- 控制域墙动态对于技术应用至关重要.
研究的目的:
- 为了研究在六边形的松化 (h-DyMnO3) 纳米晶体中的多铁基域壁的动态.
- 了解外部电场对域壁运动的影响.
- 为了确定克服固定效应所需的门电压.
主要方法:
- 使用三维 (3D) 布拉格连贯衍射成像 (BCDI) 进行高分辨率成像.
- 在单个h-DyMnO3纳米晶体上应用了变化的电场.
- 采用循环平均分析和相梯度映射来分析域壁行为.
主要成果:
- 观察到域壁运动受到固定效应的显著影响.
- 确定需要+3V的值电压来克服固定并诱导域壁移动.
- 确定了与域墙相对应的局部相位调整和高梯度区域.
结论:
- 这项研究提供了关键的洞察力,了解在外部电场下的多铁域壁的行为.
- 这些发现强调了固定效应和控制域壁动态的门电压的重要性.
- 这项研究有助于对多铁系统的理解,并为潜在的技术进步做出贡献.
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