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

Phase sensitive experiments in ferromagnetic-based Josephson junctions.

W Guichard1, M Aprili, O Bourgeois

  • 1CRTBT-CNRS, 25 Avenue des Martyrs, 38042 Grenoble, France.

Physical Review Letters
|May 7, 2003
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

Evidence for Atomic-Scale Vibron-Mediated Electron Bunching.

Physical review letters·2026
Same author

Fast and Continuous Detection of Single Microwave Photons via Photoassisted Quasiparticle Tunneling to a Superconducting Island.

Physical review letters·2026
Same author

Observation of strong tripartite coupling in a cavity-quantum circuit-antiferromagnet platform.

Nature materials·2026
Same author

Electrical control of the metal-insulator transition in a one dimensional device.

Nature communications·2026
Same author

Parametric Drive of a Double Quantum Dot in a Cavity.

Physical review letters·2025
Same author

Spectral signature of high-order photon processes enhanced by Cooper-pair pairing.

Nature communications·2025

We measured ferromagnetic Josephson junctions using a superconducting quantum interference device (SQUID). The Josephson coupling sign (0 or pi) depends on ferromagnetic layer thickness, confirmed by SQUID diffraction patterns.

Area of Science:

  • Condensed Matter Physics
  • Superconductivity
  • Quantum Devices

Background:

  • Ferromagnetic Josephson junctions exhibit unique quantum phenomena.
  • Understanding the ground state is crucial for quantum device applications.

Purpose of the Study:

  • To measure the ground state of ferromagnetic Josephson junctions.
  • To investigate the influence of ferromagnetic layer thickness on Josephson coupling.
  • To confirm the predicted 0-pi transition in Josephson coupling.

Main Methods:

  • Utilized a single direct current superconducting quantum interference device (dc SQUID) for measurements.
  • Analyzed the SQUID diffraction pattern to determine the Josephson coupling sign.
  • Varied the ferromagnetic layer thickness to observe changes in coupling.

Related Experiment Videos

Main Results:

  • Demonstrated that Josephson coupling can be positive (0 coupling) or negative (pi coupling).
  • Established a direct correlation between ferromagnetic layer thickness and the sign of Josephson coupling.
  • Observed a shift of half a quantum flux in the SQUID diffraction pattern, confirming the 0-pi transition.

Conclusions:

  • The ground state of ferromagnetic Josephson junctions is tunable via ferromagnetic layer thickness.
  • The observed 0-pi transition has implications for the design of superconducting quantum circuits.
  • Single dc SQUID measurements provide a reliable method for characterizing Josephson coupling.