在中观察异性磁效应
Ken-Ichi Uchida1,2,3,4, Shunsuke Daimon5,6,7, Ryo Iguchi8
1National Institute for Materials Science, Tsukuba, Japan. UCHIDA.Kenichi@nims.go.jp.
Nature
|May 23, 2018
概括
研究人员在单一材料中展示了佩尔蒂埃冷却和加热,挑战了结合的需要. 这可以通过铁磁体中的异性磁效应来实现,使电子设备中的新型热管理成为可能.
科学领域:
- 凝聚物质物理学
- 材料科学
- 热电
背景情况:
- 佩尔蒂埃效应传统上需要不同材料的热电冷却/加热连接.
- 传统的理解是,热电设备依赖于具有不同佩尔蒂埃系数的材料之间的接口.
研究的目的:
- 在单一材料中展示佩尔蒂埃冷却和加热, 消除了连接的需要.
- 作为一种新的热电现象,研究铁磁体中的异性磁铁-佩尔蒂埃效应.
主要方法:
- 使用主动热像技术观察温度变化.
- 用普通板进行实验以研究异性磁铁-佩尔蒂埃效应.
- 在铁磁体中操纵电荷电流和磁化配置.
主要成果:
- 在单个板中成功演示了佩尔蒂埃冷却和加热,而不需要材料连接.
- 通过改变电流和磁化配置来调整热电特性.
- 证实了对这种效应的适用性,并强调了旋转轨道相互作用的作用.
结论:
- 在单一材料系统中,异性磁铁-佩尔蒂耶效应为热电应用提供了新的途径.
- 这种效应是 anisotropic magneto-Seebeck 效应的磁性对应物,填补了铁磁热电的空白.
- 这种现象的简单性有望为电子和自旋设备开发先进的热管理解决方案.
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