Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: May 30, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

Spin superfluidity and coherent spin precession.

Yuriy M Bunkov¹

¹Institut Neel, CNRS and UJF, BP 166, F-38042, Grenoble, France.

Journal of Physics. Condensed Matter : an Institute of Physics Journal

|August 10, 2011

Summary

This summary is machine-generated.

Related Concept Videos

Spin–Spin Coupling Constant: Overview

Spin–Spin Coupling Constant: Overview

In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...

Gyroscope: Precession

Gyroscope: Precession

Precession can be demonstrated effectively through a spinning top. If a spinning top is placed on a flat surface near the surface of the Earth at a vertical angle and is not spinning, it will fall over due to the force of gravity producing a torque acting on its center of mass. However, if the top is spinning on its axis, it precesses about the vertical direction, rather than topple over due to this torque. Precessional motion is a combination of a steady circular motion of the axis and the...

Atomic Nuclei: Nuclear Spin State Overview

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...

NMR Spectroscopy: Spin–Spin Coupling

NMR Spectroscopy: Spin–Spin Coupling

The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved in...

Spin–Spin Coupling: One-Bond Coupling

Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...

Atomic Nuclei: Larmor Precession Frequency

Atomic Nuclei: Larmor Precession Frequency

The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...

You might also read

Related Articles

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

Sort by

Same author

Magnon Bose-Einstein condensation and spin superfluidity.

Journal of physics. Condensed matter : an Institute of Physics journal·2011

Same author

3He: cosmological and atomic physics experiments.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2008

See all related articles

Spontaneous magnetization precession in superfluid 3He-B reveals spin superfluidity, a quantum phenomenon analogous to mass superfluidity and superconductivity. This discovery enables research into spin supercurrents and related exotic magnetic behaviors.

Area of Science:

Condensed Matter Physics
Quantum Fluids
Spintronics

Background:

Superfluid 3He-B exhibits spontaneous phase coherent precession of magnetization.
This phenomenon is a direct manifestation of spin superfluidity, the magnetic analog of mass superfluidity.

Purpose of the Study:

To investigate the fundamental properties and implications of spin superfluidity.
To explore phenomena arising from coherent spin precession, including spin supercurrents and Josephson effects.
To develop new measurement techniques leveraging spin-mass interactions.

Main Methods:

Experimental observation of spontaneous phase coherent precession of magnetization.
Theoretical explanation of spin superfluidity and related phenomena.
Utilizing coherent spin precession for investigating mass transport and vortices.

More Related Videos

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Related Experiment Videos

Last Updated: May 30, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact

Scanning SQUID Study of Vortex Manipulation by Local Contact

Published on: February 1, 2017

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

Published on: July 20, 2022

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Main Results:

Discovery of spontaneous phase coherent magnetization precession in superfluid 3He-B.
Observation of spin supercurrents, Josephson effects, phase slippage, and spin-current vortices.
Identification of mass-spin vortices and Goldstone mode in superfluid 3He.

Conclusions:

Coherent spin precession is a key indicator of spin superfluidity and Bose-Einstein condensation of magnons.
Spin superfluidity research has paved the way for modern spintronics and electron spin supercurrent investigations.
New phenomena like mass-spin vortices highlight the interplay between mass and spin dynamics in superfluids.