纳米颗粒铁 (Fe0.53Ge0.47) 薄膜中的磁性顺序
Ruthi Zielinski1, Nhat Nguyen1, Bryce Herrington1
1Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, United States of America.
概括
应变工程控制铁 (FeGe) 薄膜中的磁性. 这项研究揭示了可调节的拓磁相,为电压控制的量子材料提供了途径.
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
- 纳米技术 纳米技术
背景情况:
- 纳米颗粒FeGe薄膜表现出由结构和组成影响的复杂磁性.
- 拓磁相,如 skyrmions,对先进的电子设备非常感兴趣.
- 应变是影响材料磁性异构和相变的已知因素.
研究的目的:
- 为了研究基板诱导的应变对FeGe薄膜中的磁性和磁化配置的影响.
- 探索纳米颗粒Fe.Ge.中拓磁态的形成和特征.
- 了解应变,磁力交换和拓磁性之间的相互作用.
主要方法:
- 在不同的基板上 (无形化与刚性基板) 制造带有和没有B20纳米晶的FeGe薄膜.
- 在不同的应变条件下,磁性特性和磁化配置的表征.
- 分析电子带结构杂交和拓状态的出现.
主要成果:
- 在无形基板上放松的FeGe膜表现出无序的 skyrmion 阶段.
- 在刚性基板上的应力FeGe薄膜显示铁磁性和Fe d水平和Ge sp频段状态的异性质混合.
- 弱合的拓状态在室温出现,在冷温度变得更加丰富,独立于缺陷或粒度边界.
结论:
- 应变工程是一种可行的方法来控制FeGe膜中的磁交换和拓磁性.
- 这些发现证明了无形量子材料中磁弹性介导的拓相电压控制的潜力.
- 这项研究为设计利用应变调节磁现象的新型自旋电子设备提供了洞察力.
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