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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Superconducting Quantum Interferometers for Nondestructive Evaluation.

M I Faley¹, E A Kostyurina^2,3, K V Kalashnikov^4,5

¹Peter Grünberg Institute, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany. m.faley@fz-juelich.de.

Sensors (Basel, Switzerland)

|December 7, 2017

Summary

Superconducting Quantum Interference Devices (SQUIDs) enable nondestructive evaluation of diverse objects. Systems range from microscopes for small samples to mobile units for larger ones, offering high magnetic field resolution.

Keywords:

SQUIDs magnetic analysis magnetic sensors nondestructive testing scanning probe microscopy

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Area of Science:

Applied Physics
Materials Science
Nondestructive Evaluation

Background:

Superconducting Quantum Interference Devices (SQUIDs) are sensitive magnetic field detectors.
Nondestructive evaluation (NDE) requires sensitive and versatile measurement systems.
Existing SQUID systems have limitations in sample size and environmental conditions.

Purpose of the Study:

To review stationary and mobile SQUID-based systems for NDE of room-temperature objects.
To discuss system optimization for a wide range of sample dimensions (10 µm to meters).
To highlight advancements in SQUID sensitivity and operational flexibility.

Main Methods:

Utilizing a SQUID microscope with a magnetic flux antenna for small samples (10 µm-10 cm).
Employing a mobile liquid nitrogen cryostat with a gradiometric SQUID sensor for larger samples.
Operating low-T_c and high-T_c DC SQUID systems in various magnetic environments.

Main Results:

SQUID microscope achieves non-disturbing imaging of sample magnetization.
Mobile systems provide NDE capabilities for larger objects.
High-T_c SQUID magnetometers demonstrate magnetic field resolution down to ~2 fT/√Hz at 77 K.

Conclusions:

SQUID technology offers versatile solutions for NDE across various scales.
System designs are adaptable for different sample sizes and environmental conditions.
Advancements in SQUID sensitivity and mobile systems expand NDE applications.