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 Concept Videos

Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.6K
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...
1.6K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.6K
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,...
1.6K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.9K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.9K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.7K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.7K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.6K
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...
3.6K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

2.2K
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...
2.2K

You might also read

Related Articles

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

Sort by
Same author

Resolving a Complex Neonatal Phenotype by Rapid Trio Whole-Genome Sequencing: A De Novo 11q14.3-q22.3 Deletion and a Splicing-Altering Synonymous ANK1 Variant.

Journal of clinical laboratory analysis·2026
Same author

A simple, high-throughput LC-MS/MS method for the simultaneous quantification of four antiarrhythmic drugs and two metabolites: large-scale application to 622 patient samples.

Talanta·2026
Same author

Nanoparticle-enriched mass spectrometry enables comprehensive plasma proteomics and reveals novel candidates for mild cognitive impairment.

Scientific reports·2026
Same author

Esports in-game consumption across generations: Integrating motivated reasoning theory and the theory of planned behavior.

PloS one·2026
Same author

Crystal symmetry-dependent Orbital Rashba Edelstein effect in epitaxial CuO thin film.

Nature communications·2026
Same author

Comparative Evaluation of the Effects of Serum Separator Tubes and Transport Systems on Hormone and Tumor Marker Measurements.

Annals of laboratory medicine·2026
Same journal

Bethe-Salpeter equation calculations of core excitation spectra.

Physical review. B, Condensed matter and materials physics·2019
Same journal

Electronic properties of α-UH<sub>3</sub> stabilized by Zr.

Physical review. B, Condensed matter and materials physics·2017
Same journal

Optical Control of Donor Spin Qubits in Silicon.

Physical review. B, Condensed matter and materials physics·2017
Same journal

<i>In situ</i> spectroscopic study of the plastic deformation of amorphous silicon under non-hydrostatic conditions induced by indentation.

Physical review. B, Condensed matter and materials physics·2016
Same journal

Mixed Brownian alignment and Néel rotations in superparamagnetic iron oxide nanoparticle suspensions driven by an ac field.

Physical review. B, Condensed matter and materials physics·2015
Same journal

Long-range modulation of a composite crystal in a five-dimensional superspace.

Physical review. B, Condensed matter and materials physics·2015
See all related articles

Related Experiment Video

Updated: Mar 25, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

24.0K

Intrinsic spin torque without spin-orbit coupling.

Kyoung-Whan Kim1, Kyung-Jin Lee2, Hyun-Woo Lee3

  • 1Basic Science Research Institute, Pohang University of Science and Technology, Pohang 790-784, Korea; PCTP and Department of Physics, Pohang University of Science and Technology, Pohang 790-784, Korea; Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA; Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, USA.

Physical Review. B, Condensed Matter and Materials Physics
|February 16, 2016
PubMed
Summary
This summary is machine-generated.

We discovered a new intrinsic electric-field-induced spin torque in magnetic textures. This non-adiabatic spin torque differs from current-induced effects and offers a novel mechanism for spintronic devices.

More Related Videos

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

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

Published on: June 28, 2018

10.6K
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

8.2K

Related Experiment Videos

Last Updated: Mar 25, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

24.0K
Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

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

Published on: June 28, 2018

10.6K
Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
06:49

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates

Published on: April 12, 2019

8.2K

Area of Science:

  • Condensed Matter Physics
  • Spintronics
  • Materials Science

Background:

  • Non-adiabatic spin torque is crucial for spintronic device operation.
  • Existing models often focus on current-induced effects and extrinsic mechanisms.
  • Understanding intrinsic contributions is key to advancing spintronic technologies.

Purpose of the Study:

  • To derive and characterize a novel intrinsic contribution to non-adiabatic spin torque.
  • To differentiate this new torque from previously understood current-induced and extrinsic torques.
  • To explore its relationship with intrinsic spin-orbit torque.

Main Methods:

  • Theoretical derivation of the intrinsic spin torque.
  • Analysis of electronic state perturbations under electric fields.
  • Comparison with existing models of spin torque and spin-orbit coupling.

Main Results:

  • An intrinsic non-adiabatic spin torque was derived, distinct from current-induced effects.
  • This torque arises from electric-field perturbation of electronic states, not electron occupation changes.
  • It is independent of extrinsic relaxation mechanisms and spin-orbit coupling.

Conclusions:

  • The identified intrinsic spin torque is electric-field-induced, not current-induced.
  • This mechanism can be dominant in certain magnetic texture models.
  • A chiral connection exists between this torque and intrinsic spin-orbit torque in Rashba systems.