Development of Wideband Scanning Superconducting Quantum Interference Device Susceptometers for Nanomagnetic Materials Research and Education
用于纳米磁性材料研究和教育的宽带扫描超导量子干涉装置磁感受计的开发
基本信息
- 批准号:0216470
- 负责人:
- 金额:$ 22万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2002
- 资助国家:美国
- 起止时间:2002-09-15 至 2006-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Nanomagnetic devices for applications such as quantum computing and high-capacity memory cannot be developed without faster, more sensitive characterization tools to directly probe phenomena and material structures at the nanoscale. The objective of this work is to advance the capability of a non-invasive, high-sensitivity technique, scanning superconducting quantum interference device (SQUID) susceptometry, for the dynamic characterization of nanomagnetic materials, systems, and phenomena. The principal investigator achieves this objective through two innovations. First, spin sensitivity is improved from the current state of the art, a few thousand electron spins per Hz1/2 , to a few tens of spins per Hz1/2. This improvement is accomplished by reduction of pickup loop dimensions in a combined optical and electron-beam lithography process and by utilizing an ultra-low-noise dc SQUID process. Second, bandwidth is increased from the current state of the art, tens of kHz, to tens of MHz by the use of dc SQUID series array amplifiers as preamplifiers for the dc SQUID susceptometer. The devices are characterized for flux sensitivity and bandwidth at 300 mK and 20 mK. Operation at 300 mK is necessary for the e-beam defined Al pick-up loops to become superconducting, and operation at 20 mK is essential for the study of quantum decoherence mechanisms in electronic systems. Undergraduates, working with graduate students in the collaborator's laboratory, characterize the spin sensitivity of the devices and their performance under realistic scanning conditions by imaging individual cobalt nanomagnetic spheres of controlled diameters ranging from 3 nm to 10 nm and magnetic moments ranging from tens to tens of thousands of electron spins. Further, one SQUID susceptometer is used to image a second, identical device to quantitatively characterize the noise generated by the devices. The scientific emphasis of this project is to produce sensors that have applications in the area of nanoscale structures, novel phenomena, and quantum control and to use these sensors to image both static and dynamic properties of individual cobalt nanomagnets. Integration of a high-sensitivity, high-bandwidth SQUID susceptometer into a scanning platform significantly increases the number and kind of systems that can be studied, decreases the turn-around time, and increases the number of samples that can be studied in a single experiment. Thus, this project contributes to advances in nanoscale materials, devices and system architecture. An added benefit of this project is the educational benefits at both CU-Denver (PI's institution) and Stanford University (collaborator's institution) resulting from the collaboration between CU-Denver undergraduate students and Stanford graduate students.
如果没有更快、更灵敏的表征工具来直接探测纳米级的现象和材料结构,就无法开发用于量子计算和高容量存储器等应用的纳米磁性器件。这项工作的目的是提高能力的非侵入性的,高灵敏度的技术,扫描超导量子干涉仪(SQUID)的磁测量,纳米磁性材料,系统和现象的动态表征。主要研究者通过两项创新实现了这一目标。首先,自旋灵敏度从现有技术的每Hz 1/2几千个电子自旋提高到每Hz 1/2几十个自旋。这一改进是通过减少拾取环的尺寸在一个组合的光学和电子束光刻过程中,并通过利用超低噪声直流SQUID过程。其次,通过使用直流SQUID系列阵列放大器作为直流SQUID磁强计的前置放大器,带宽从当前技术水平的几十kHz增加到几十MHz。 该设备的特点是通量灵敏度和带宽在300 mK和20 mK。在300 mK的操作是必要的电子束定义的铝拾取回路成为超导,在20 mK的操作是必不可少的量子退相干机制的研究在电子系统中。本科生与合作者实验室的研究生一起工作,通过对单个钴纳米磁性球体进行成像来表征设备的自旋灵敏度及其在现实扫描条件下的性能,这些纳米磁性球体的可控直径范围为3 nm至10 nm,磁矩范围为数十至数万电子自旋。此外,使用一个SQUID辐射计对第二个相同的器件进行成像,以定量表征器件产生的噪声。该项目的科学重点是生产在纳米结构,新现象和量子控制领域应用的传感器,并使用这些传感器来成像单个钴纳米磁体的静态和动态特性。将高灵敏度、高带宽的SQUID温度计集成到扫描平台中,可显著增加可研究系统的数量和种类,减少周转时间,并增加单次实验中可研究的样品数量。因此,该项目有助于纳米材料,器件和系统架构的进步。该项目的另一个好处是,丹佛大学(PI的机构)和斯坦福大学(合作者的机构)的教育效益来自丹佛大学本科生和斯坦福大学研究生之间的合作。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Martin Huber其他文献
How residence permits affect the labor market attachment of foreign workers: Evidence from a migration lottery in Liechtenstein
- DOI:
10.1016/j.euroecorev.2023.104377 - 发表时间:
2023-02-01 - 期刊:
- 影响因子:
- 作者:
Berno Buechel;Selina Gangl;Martin Huber - 通讯作者:
Martin Huber
Instrumente behördlicher Kommunikation zu Anwendungsrisiken von Arzneimitteln
- DOI:
10.1007/s00103-022-03527-w - 发表时间:
2022-04-26 - 期刊:
- 影响因子:1.500
- 作者:
Simone Bergner;Thomas Grüger;Martin Huber;Walburga Lütkehermölle;Norbert Paeschke;Harriet Palissa;Kerstin Stephan;Sabine Cibura;Brigitte Keller-Stanislawski - 通讯作者:
Brigitte Keller-Stanislawski
Flagging cartel participants with deep learning based on convolutional neural networks
利用基于卷积神经网络的深度学习标记卡特尔参与者
- DOI:
10.1016/j.ijindorg.2023.102946 - 发表时间:
2023 - 期刊:
- 影响因子:1.5
- 作者:
Martin Huber;David Imhof - 通讯作者:
David Imhof
The Effect of Online Bidding on Competition in Public Procurement Auction: A case of a Japanese Municipality
网上投标对公共采购拍卖竞争的影响:以日本市政府为例
- DOI:
- 发表时间:
2018 - 期刊:
- 影响因子:0
- 作者:
Martin Huber;David Imhof and Rieko Ishii;Rieko Ishii - 通讯作者:
Rieko Ishii
On the values of the functorlim
- DOI:
10.1007/bf01222781 - 发表时间:
1979-12-01 - 期刊:
- 影响因子:0.500
- 作者:
R. B. Warfield;Martin Huber - 通讯作者:
Martin Huber
Martin Huber的其他文献
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{{ truncateString('Martin Huber', 18)}}的其他基金
Collaborative Research: The SuperCDMS at SNOLAB Science Program
合作研究:SNOLAB 科学计划的 SuperCDMS
- 批准号:
2111090 - 财政年份:2021
- 资助金额:
$ 22万 - 项目类别:
Continuing Grant
MRI: Development of an Ultra-high Sensitivity Scanning SQUID Multi-Function Microscope for Nanoscale Magnetometry, Susceptometry, and Thermometry
MRI:开发用于纳米级磁力测定、电纳测定和测温的超高灵敏度扫描 SQUID 多功能显微镜
- 批准号:
1920324 - 财政年份:2019
- 资助金额:
$ 22万 - 项目类别:
Standard Grant
Collaborative Research: The SuperCDMS SNOLAB Experiment
合作研究:SuperCDMS SNOLAB 实验
- 批准号:
1809769 - 财政年份:2018
- 资助金额:
$ 22万 - 项目类别:
Continuing Grant
Readout Systems for Cryogenic Dark Matter Detectors/SuperCDMS SNOLAB
用于低温暗物质探测器的读出系统/SuperCDMS SNOLAB
- 批准号:
1708181 - 财政年份:2017
- 资助金额:
$ 22万 - 项目类别:
Standard Grant
Readout Systems for Cryogenic Dark Matter Detectors
低温暗物质探测器的读出系统
- 批准号:
1408414 - 财政年份:2014
- 资助金额:
$ 22万 - 项目类别:
Continuing Grant
SQUID-based Readout Systems for Cryogenic Dark Matter Detectors
用于低温暗物质探测器的基于 SQUID 的读出系统
- 批准号:
1102795 - 财政年份:2011
- 资助金额:
$ 22万 - 项目类别:
Continuing Grant
Superconducting Electronics Readout Systems for WIMP Dark Matter Direct Detection Experiments (CDMS)
用于 WIMP 暗物质直接探测实验 (CDMS) 的超导电子读出系统
- 批准号:
0801708 - 财政年份:2008
- 资助金额:
$ 22万 - 项目类别:
Continuing Grant
SuperCDMS Development Project: Detectors: Superconducting Electronics Systems R&D
SuperCDMS 开发项目:探测器:超导电子系统 R
- 批准号:
0503641 - 财政年份:2005
- 资助金额:
$ 22万 - 项目类别:
Continuing Grant
NER: High-Bandwidth Scanning DC SQUID Susceptometer for Characterization of Nanomagnetic Structures and Phenomena
NER:用于表征纳米磁性结构和现象的高带宽扫描直流 SQUID 感受器
- 批准号:
0210877 - 财政年份:2002
- 资助金额:
$ 22万 - 项目类别:
Standard Grant
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