Long-Range Spin Transport in Light-Metal Alloys

轻金属合金中的长程自旋输运

基本信息

批准号：
2103711
负责人：
Christopher Leighton
金额：
$ 43.35万
依托单位：
University of Minnesota-Twin Cities
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-08-01 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2103711&HistoricalAwards=false
关键词：
Long Range Spin Transport Light

项目摘要

Non-Technical AbstractMagnetic materials are ubiquitous in technology, from the permanent magnets all around us to the precisely engineered magnetic materials in the powerful hard disk drives that enable cloud data storage. Spintronics is the scientific field that underpins such technologies, based on control of the property of electrons known as spin. One major limitation in the field of spintronics is that is very challenging to move electron spins over even microscopic distances; the ability to do so would unlock extraordinary technological potential, including massively reducing the power consumption of computers. This project is addressing exactly this challenge, not only seeking long-range transport of electron spins, but doing so in industrially-relevant materials based on simple metals. In addition to advancing the fundamental understanding of the physics of this process, broader impacts are being achieved through the high technological relevance of the work, through education and training of graduate and undergraduate students (thus contributing to a skilled US workforce in the electronic device sector), and through outreach to the public in conjunction with the Science Museum of Minnesota. Technical Abstract In spintronics, injection of spins across interfaces, and their subsequent transport, is central to the function of many devices. Such devices have already massively impacted data storage and processing, with potential for further advances. One particularly exciting prospect is long-range spin transport through materials, which could realize transformative capabilities such as spin interconnects and spin accumulation sensors. Fundamental research on long-range spin transport has focused almost entirely on semiconductors and insulators, despite metallic spintronics being well-established and amenable to technology. This is because spin diffusion lengths in conventional polycrystalline non-magnetic metallic thin films are typically only 100’s of nm, limited by defect-induced spin relaxation. This project seeks to directly alleviate this limitation. Orders-of-magnitude increases in spin diffusion lengths in nonmagnetic metallic thin films are being sought via novel application of rationally-designed light-metal alloys, using theory-guided compositional tuning of electronic structure and band filling to controllably suppress spin relaxation. In addition to advancing the fundamental understanding of the relevant physics, broader impacts are being achieved through the high technological relevance of the work, through education and training of graduate and undergraduate students, and through outreach to the public in conjunction with the Science Museum of Minnesota.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

从我们周围的永久磁铁到功能强大的硬盘驱动器中精确设计的磁性材料，非技术抽象材料在技术方面无处不在，可实现云数据存储。 Spintronics是基于对自旋的电子特性的控制，是基于此类技术的科学领域。 Spintronics领域的一个主要局限性是，在微观距离上移动电子旋转非常挑战。这样做的能力将解锁非凡的技术潜力，包括大量降低计算机的功耗。该项目正是解决了这一挑战，不仅要寻求电子旋转的远程运输，而且在基于简单金属的工业型材料中进行此挑战。除了促进对这一过程物理学的基本了解外，还通过工作的高度技术相关性，通过对研究生和本科生的教育和培训（这为电子设备领域的熟练美国劳动力做出贡献）以及与Minesnesota的科学博物馆的公众相结合来实现更广泛的影响。旋转技术中的技术摘要，跨接口的旋转及其随后的运输是许多设备功能的核心。此类设备已经对数据存储和处理产生了巨大影响，并有可能进一步发展。一个特别令人兴奋的前景是通过材料进行远距离自旋传输，该材料可以实现变革性的功能，例如自旋互连和自旋积累传感器。关于远程旋转运输的基本研究几乎完全集中在半导体和绝缘子上，理想的金属旋转型物质已建立了良好的技术和适合技术。这是因为传统多晶金属薄膜中的自旋扩散长度通常仅100 nm，受到缺陷诱导的自旋松弛的限制。该项目寻求直接减轻此限制。使用理论指导的电子结构的理论引导的复合调音来，通过新颖地应用理性设计的光 - 金属合金来感知非磁性金属薄膜中自旋扩散长度的命令级增加。除了促进对相关物理学的基本理解之外，还通过工作的高度技术相关性，通过对研究生和本科生的教育和培训，以及与明尼苏达州科学博物馆结合与公众进行宣传，从而实现更广泛的影响，这与NSF的法定任务和范围的范围都在评估中受到评估，这对范围的审查均表现出色。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Experimental Realization of the 1D Random Field Ising Model

DOI：
10.1103/physrevlett.127.207203
发表时间：
2021-11-11
期刊：
PHYSICAL REVIEW LETTERS
影响因子：
8.6
作者：
Bingham, N. S.;Rooke, S.;Schiffer, P.
通讯作者：
Schiffer, P.

Topological kinetic crossover in a nanomagnet array

纳米磁体阵列中的拓扑动力学交叉

DOI：
10.1126/science.add6575
发表时间：
2023
期刊：
Science
影响因子：
56.9
作者：
Zhang, Xiaoyu;Fitez, Grant;Subzwari, Shayaan;Bingham, Nicholas S.;Chioar, Ioan-Augustin;Saglam, Hilal;Ramberger, Justin;Leighton, Chris;Nisoli, Cristiano;Schiffer, Peter
通讯作者：
Schiffer, Peter

High spin polarization and spin signal enhancement in non-local spin valves with Co–Fe alloy injectors and detectors

使用 Co-Fe 合金注射器和探测器的非局部自旋阀中的高自旋极化和自旋信号增强