在针尖上自对准的纳米级超导量子干涉仪（SQUID）。

Self-aligned nanoscale SQUID on a tip.

机构信息

Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel.

出版信息

Nano Lett. 2010 Mar 10;10(3):1046-9. doi: 10.1021/nl100009r.

PMID:20131810

Abstract

A nanometer-sized superconducting quantum interference device (nanoSQUID) is fabricated on the apex of a sharp quartz tip and integrated into a scanning SQUID microscope. A simple self-aligned fabrication method results in nanoSQUIDs with diameters down to 100 nm with no lithographic processing. An aluminum nanoSQUID with an effective area of 0.034 microm2 displays flux sensitivity of 1.8 x 10(-6) Phi(0)/Hz(1/2) and operates in fields as high as 0.6 T. With projected spin sensitivity of 65 micro(B)/Hz(1/2) and high bandwidth, the SQUID on a tip is a highly promising probe for nanoscale magnetic imaging and spectroscopy.

摘要

在一个尖锐的石英尖端上制造出一个纳米级超导量子干涉器件（nanoSQUID），并将其集成到扫描超导量子干涉显微镜中。一种简单的自对准制造方法可以制造出直径小至 100nm 的 nanoSQUID，而无需光刻处理。一个有效面积为 0.034 微米的铝 nanoSQUID 在 1.8 x 10(-6) Phi(0)/Hz(1/2)的磁通灵敏度下工作，并且可以在高达 0.6T 的磁场中工作。具有 65 微(B)/Hz(1/2)的预期自旋灵敏度和高带宽，尖端上的 SQUID 是用于纳米级磁成像和光谱学的非常有前途的探头。