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在超低电流密度下,MnSi中的旋转转矩转移
F Jonietz1, S Mühlbauer, C Pfleiderer
1Physik-Department E21, Technische Universität München, D-85748 Garching, Germany.
Science (New York, N.Y.)
|December 18, 2010
概括
电流有效地操纵了中的磁性 skyrmions. 这种旋转突破使用最小的电流来旋转旋转结构,揭示了高效的合机制.
科学领域:
- 这就是Spintronics.
- 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
背景情况:
- 通过电流操纵自旋对于自旋电子学至关重要.
- 斯基尔米昂格子,就像的格子一样,表现出复杂的磁结构.
- 了解这些材料的电流驱动动力学是未来设备的关键.
研究的目的:
- 为了研究电流对散装酸磁性结构的影响.
- 为了观察极低电流密度下斯基米翁晶格的行为.
主要方法:
- 使用中子散射来探测磁结构.
- 控制电流被应用到一个散装和样本.
主要成果:
- 根据电流的反应观察到衍射图案的旋转.
- 这种效果是通过比典型值小五个数量级的电流实现的.
- 证明了不均的旋转电流和拓旋转结构之间的高效合.
结论:
- 电流可以有效地控制散装材料中的磁性 skyrmions.
- 这些发现表明了电流驱动磁化动态的新机制.
- 这项工作为低功率的自旋电子设备开辟了新的途径.
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