• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Emergent electromagnetic induction in a helical-spin magnet
【24h】

Emergent electromagnetic induction in a helical-spin magnet

机译：螺旋纺磁铁中的紧急电磁感应

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

An inductor, one of the most fundamental circuit elements in modern electronic devices, generates a voltage proportional to the time derivative of the input current(1). Conventional inductors typically consist of a helical coil and induce a voltage as a counteraction to time-varying magnetic flux penetrating the coil, following Faraday's law of electromagnetic induction. The magnitude of this conventional inductance is proportional to the volume of the inductor's coil, which hinders the miniaturization of inductors(2). Here, we demonstrate an inductance of quantum-mechanical origin(3), generated by the emergent electric field induced by current-driven dynamics of spin helices in a magnet. In microscale rectangular magnetic devices with nanoscale spin helices, we observe a typical inductance as large as -400 nanohenry, comparable in magnitude to that of a commercial inductor, but in a volume about a million times smaller. The observed inductance is enhanced by nonlinearity in current and shows non-monotonous frequency dependence, both of which result from the current-driven dynamics of the spin-helix structures. The magnitude of the inductance rapidly increases with decreasing device cross-section, in contrast to conventional inductors. Our findings may pave the way to microscale, simple-shaped inductors based on emergent electromagnetism related to the quantum-mechanical Berry phase.Microscale magnetic devices containing nanoscale spin helices produce an inductance comparable in magnitude to that of a commercial inductor, in a volume about a million times smaller.
机译：电感器是现代电子设备中最基本的电路元件之一，产生与输入电流（1）的衍生成比例的电压。常规电感器通常由螺旋线圈组成，并且在Faraday的电磁感应定律之后，促进电压作为抵抗线圈的时变磁通量的反应。这种传统电感的幅度与电感线圈的体积成比例，其阻碍了电感器（2）的小型化。在这里，我们证明了量子 - 机械原点（3）的电感，由磁铁中的旋转螺旋的电流驱动动态引起的紧急电场产生的。在带纳米级旋转螺旋的微观矩形磁性装置中，我们观察大约-400纳期的典型电感，幅度的大小与商业电感器相比，但体积大约百万倍。通过电流的非线性增强观察到的电感，并显示出非单调的频率依赖性，这两者都是由旋转螺旋结构的电流驱动动态产生的。与传统电感器相比，电感的幅度随着减小的装置横截面而迅速增加。我们的研究结果可以铺平了基于与量子机械浆膜相对的紧急电磁的微观形状的电感器的方法。包含纳米级旋转螺旋的磁性装置的磁性装置，其体积产生相当于商业电感的电感。一百万次更小。

著录项

  • 来源
    《Nature》 |2020年第7828期|232-236|共5页
  • 作者

    Yokouchi Tomoyuki; Kagawa Fumitaka; Hirschberger Max; Otani Yoshichika; Nagaosa Naoto; Tokura Yoshinori;

  • 作者单位

    RIKEN Ctr Emergent Matter Sci CEMS Wako Saitama Japan;

    RIKEN Ctr Emergent Matter Sci CEMS Wako Saitama Japan|Univ Tokyo Dept Appl Phys Tokyo Japan;

    RIKEN Ctr Emergent Matter Sci CEMS Wako Saitama Japan|Univ Tokyo Quantum Phase Elect Ctr QPEC Tokyo Japan;

    RIKEN Ctr Emergent Matter Sci CEMS Wako Saitama Japan|Univ Tokyo Inst Solid State Phys ISSP Kashiwa Chiba Japan;

    RIKEN Ctr Emergent Matter Sci CEMS Wako Saitama Japan|Univ Tokyo Dept Appl Phys Tokyo Japan;

    RIKEN Ctr Emergent Matter Sci CEMS Wako Saitama Japan|Univ Tokyo Dept Appl Phys Tokyo Japan|Univ Tokyo Tokyo Coll Tokyo Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号