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Scanning SQUID Study of Vortex Manipulation by Local Contact

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

Self-aligned nanoscale SQUID on a tip.

Amit Finkler¹, Yehonathan Segev, Yuri Myasoedov

¹Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel. amit.finkler@weizmann.ac.il

|February 6, 2010

Summary

This summary is machine-generated.

Researchers developed a novel nanoSQUID on a quartz tip for advanced nanoscale magnetic imaging. This tiny device offers high sensitivity and bandwidth, enabling detailed magnetic spectroscopy and imaging applications.

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Area of Science:

Physics
Materials Science
Nanotechnology

Background:

Scanning SQUID microscopy requires highly sensitive, localized magnetic field sensors.
Existing nanoSQUID fabrication can be complex and limited in resolution.

Purpose of the Study:

To fabricate and characterize a novel nanometer-sized superconducting quantum interference device (nanoSQUID) integrated onto a sharp quartz tip.
To assess its potential as a probe for nanoscale magnetic imaging and spectroscopy.

Main Methods:

A simple, self-aligned fabrication method was employed to create nanoSQUIDs down to 100 nm without lithography.
The nanoSQUID was integrated onto the apex of a quartz tip for scanning SQUID microscopy.
Flux sensitivity and operation in magnetic fields were measured.

Main Results:

Fabricated nanoSQUIDs with diameters as small as 100 nm.
Achieved a flux sensitivity of 1.8 x 10(-6) Phi(0)/Hz(1/2) for an aluminum nanoSQUID.
Demonstrated operation in magnetic fields up to 0.6 T.

Conclusions:

The nanoSQUID on a tip is a highly promising probe for nanoscale magnetic imaging and spectroscopy.
Its projected spin sensitivity and high bandwidth further enhance its utility.
The fabrication method is simple and avoids complex lithographic processing.