Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Josephson junctions and DC SQUIDS based on Nb/Al technology.

J Flokstra1, D J Adelerhof, E P Houwman

  • 1University of Twente, Faculty of Applied Physics, Enschede, The Netherlands.

Clinical Physics and Physiological Measurement : an Official Journal of the Hospital Physicists' Association, Deutsche Gesellschaft Fur Medizinische Physik and the European Federation of Organisations for Medical Physics
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Johnson Noise <i>Thermometry</i>.

Measurement science & technology·2024
Same author

Interfacial dielectric layer as an origin of polarization fatigue in ferroelectric capacitors.

Scientific reports·2020
Same author

A Boltzmann Constant Determination Based on Johnson Noise Thermometry.

Metrologia·2017
Same author

Magnetic particles and sensing methods for medical applications.

Journal of controlled release : official journal of the Controlled Release Society·2011
Same author

Initial structure and growth dynamics of YBa(2)Cu(3)O(7-delta) during pulsed laser deposition.

Physical review letters·2008
Same author

Flip-flopping fractional flux quanta.

Science (New York, N.Y.)·2006
Same journal

Changes of erythropoietic and storage iron components in certain clinical situations as evaluated by ferrokinetic investigations.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same journal

An error study on some linear reconstruction algorithms for electrical impedance tomography.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same journal

Effects of myocardial electrotonic interaction on the sequence of excitation and repolarisation and on T wave polarity. Computer modelling experiments.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same journal

Spectrophotometric measurements of haemoglobin saturation and concentration in skin during the tuberculin reaction in normal human subjects.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same journal

Antimony electrode for the determination of the intramyocardial pH during open-heart surgery.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
Same journal

A thermal clearance probe for continuous monitoring of cerebral blood flow.

Clinical physics and physiological measurement : an official journal of the Hospital Physicists' Association, Deutsche Gesellschaft fur Medizinische Physik and the European Federation of Organisations for Medical Physics·1992
See all related articles

Researchers developed a fabrication process for high-quality Josephson junctions and DC SQUIDs using Nb/Al technology. This advancement focuses on optimizing noise properties for improved device performance and applications.

Area of Science:

  • Superconducting electronics
  • Materials science

Background:

  • Josephson junctions and DC SQUIDs are crucial for sensitive magnetic field detection.
  • Existing fabrication methods present challenges in achieving high quality and controlled properties.

Purpose of the Study:

  • To develop a robust fabrication process for high-quality Nb/Al Josephson junctions and DC SQUIDs.
  • To characterize the electrical and noise properties of various junction types and SQUID configurations.
  • To enable the construction of advanced multi-channel SQUID magnetometers.

Main Methods:

  • Deposition of Nb/Al layers using DC magnetron sputtering.
  • Formation of the AlO_x barrier via thermal oxidation.
  • Anodization for defining junction areas (5 μm x 5 μm).

Related Experiment Videos

  • Fabrication of three types of Josephson tunnel junctions (standard, symmetric, double oxide).
  • Characterization through current-voltage and conductance-voltage measurements at varying temperatures.
  • Development and comparison of three DC SQUID configurations (standard, resistively shunted, inductively shunted).

    • Main Results:

    • Successfully fabricated high-quality Nb/Al Josephson junctions with defined barrier properties.
    • Presented detailed gap, sub-gap, and barrier parameters for different junction types.
    • Characterized and compared the performance and noise properties of three DC SQUID configurations.
    • Demonstrated the feasibility of constructing a 19-channel DC SQUID magnetometer.

    Conclusions:

    • The developed Nb/Al technology provides a reliable method for fabricating high-performance Josephson junctions and DC SQUIDs.
    • The study offers valuable insights into optimizing noise behavior for enhanced SQUID magnetometer sensitivity.
    • This work paves the way for advanced superconducting sensor applications, including multi-channel magnetometry.