在晶体反铁磁氧化物中调节的长距离旋转运输
R Lebrun1, A Ross2,3, S A Bender4
1Institute for Physics, Johannes Gutenberg-University Mainz, Mainz, Germany. rolebrun@uni-mainz.de.
Nature
|September 14, 2018
概括
研究人员在抗铁磁绝缘体血矿中证明了长距离的自旋电流传输. 这一突破利用了自旋霍尔效应,为高效,低功率的自旋电子设备铺平了道路,
科学领域:
- 物理
- 材料科学
- 电气工程
背景情况:
- 它的目标是用基于旋转的技术来取代传统的电子设备,从而降低能源消耗.
- 由于其稳定性和高频操作,抗铁磁材料为旋电学提供了优势,但其旋转传输距离有限.
- 之前的研究表明,通过反铁磁铁的旋转传输仅限于几纳米.
研究的目的:
- 在反铁磁绝缘体中演示长距离旋转电流传播.
- 探索血 (α-Fe2O3) 在旋转应用中的潜力.
- 开发一种方法来控制反铁磁体中的自旋电流流.
主要方法:
- 使用旋转霍尔效应将旋转注入一个单晶的血.
- 通过调整反铁磁共振频率与外部磁场来控制旋转电流.
- 在血-接口上研究了旋转运输.
主要成果:
- 通过几十微米的血矿实现了自旋电流的长距离传播.
- 证明了与复杂铁磁体相匹配的高效旋转传输.
- 展示了与反铁磁尼尔顺序并行的旋转信息传输.
结论:
- 抗铁磁绝缘体如血矿可以支持高效的长距离旋转运输.
- 这项研究使得基于反铁磁绝缘体的电调,超快,低功率的自旋电子装置的开发成为可能.
- 这些发现表明在室温下运行的无磁场旋转器件的潜力.
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