在BiFeO3中用电场切换自旋环形体
Peter Meisenheimer1, Guy Moore2,3, Shiyu Zhou4
1Department of Materials Science and Engineering, University of California, Berkeley, CA, USA. meisep@berkeley.edu.
Nature communications
|April 4, 2024
概括
研究人员使用钻石磁力测量可视化了 bismuth ferrite (BiFeO3) 中的磁自旋环状物. 证明了电场控制,揭示了基质诱导的异性异性,影响了旋转环状结构.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 磁力学和螺旋电子学
背景情况:
- 铁酸 (BiFeO3) 是一个室温多铁材料,具有合的铁电和磁顺序.
- 它的磁性特性源于一个自旋环状结构,此前使用平均,中等尺度测量进行了研究.
- 了解BiFeO3中的磁电合对于开发新型电子设备至关重要.
研究的目的:
- 在现实空间中可视化BiFeO3的磁自旋环状结构.
- 为了研究磁电合及其在电场切换下的行为.
- 了解基质诱导的异构性对旋转环状体偏好的传播方向的作用.
主要方法:
- 基于空的钻石磁力计,用于实时空间观测磁自旋环流体.
- 在平面内和平面外的电转换实验来操纵铁电极化.
- Ab initio计算以研究应变和铁电顺序对磁性异性质的影响.
主要成果:
- 在现实空间中直接可视化BiFeO3磁自旋环状结构.
- 确认磁电合,其中电场切换保持了自旋环形体与铁电极化之间的关系.
- 发现基质表层会诱导磁弹性异构性,决定了首选的旋转环状物传播方向.
结论:
- 这项研究为BiFeO3自旋环状结构提供了前所未有的真实空间洞察力.
- 实现了自旋环形体的电场控制,突出了其在设备应用中的潜力.
- 应变诱导的异构性在塑造旋转环状体的能量格局和传播方面发挥着重要作用,为材料设计提供了新的途径.
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