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Related Concept Videos

Superconductor01:24

Superconductor

A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Updated: Jun 4, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

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

Published on: August 2, 2019

Note: A hand-held high-Tc superconducting quantum interference device operating without shielding.

D F He1

  • 1Superconducting Materials Center, National Institute for Materials Science, Tsukuba, Ibaraki, Japan. he.dongfeng@nims.go.jp

The Review of Scientific Instruments
|March 3, 2011
PubMed
Summary
This summary is machine-generated.

A new hand-held, high-temperature radio frequency superconducting quantum interference device (SQUID) system was developed. This portable SQUID system successfully detected defects under an aluminum plate using eddy-current testing.

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Published on: January 19, 2018

Area of Science:

  • Applied Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Superconducting Quantum Interference Devices (SQUIDs) offer high sensitivity for various applications.
  • Existing SQUID systems often require shielded environments, limiting their portability and practical use.
  • High-temperature superconductors (high-Tc) present an opportunity for more accessible SQUID technology.

Purpose of the Study:

  • To develop a portable, hand-held radio frequency (RF) SQUID system.
  • To enhance the operational stability of the SQUID in unshielded environments.
  • To demonstrate the practical application of the developed SQUID system in non-destructive testing.

Main Methods:

  • Improved compensation circuit design for the RF SQUID system.
  • Development of a hand-held, high-Tc SQUID device.
  • Utilized eddy-current testing methodology for defect detection.
  • Performed tests in both shielded and unshielded environments.

Main Results:

  • Successfully developed a functional hand-held high-Tc RF SQUID system.
  • The system demonstrated stable operation while being moved in an unshielded environment.
  • Artificial defects beneath a 6 mm aluminum plate were successfully detected using manual SQUID manipulation.

Conclusions:

  • The improved compensation circuit enables robust operation of hand-held SQUID systems outside of shielded environments.
  • The developed portable SQUID system is effective for practical applications like eddy-current testing.
  • This advancement paves the way for wider adoption of SQUID technology in field-based NDT.