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

997
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...
997
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.0K
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,...
1.0K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

1.1K
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...
1.1K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

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

1.1K
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...
1.1K
P-N junction01:11

P-N junction

634
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
634
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

1.6K
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...
1.6K

You might also read

Related Articles

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

Sort by
Same author

Mitigating Solvent Erosion to Enhance Self-Assembled Monolayer Coverage and Perovskite Solar Cell Performance.

ACS applied materials & interfaces·2026
Same author

Unconventional Zero-Field-Cooling Exchange Bias in 2D Van der Waals Magnetic Heterostructures.

Nano letters·2026
Same author

Altermagnetic Magnons in Twisted van der Waals Antiferromagnets.

Nano letters·2026
Same author

Field-free full switching of chiral antiferromagnetic order.

Nature·2026
Same author

Broadband Excitation of Antiferromagnetic Dynamics by Acoustic Phonons.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Reconfigurable Magneto-Optoelectronic Devices for Multidimensional Optical Neural Network.

Small science·2026

Related Experiment Video

Updated: Aug 28, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

5.8K

Spin homojunction with high interfacial transparency for efficient spin-charge conversion.

Lei Han1, Yuyan Wang2, Wenxuan Zhu1

  • 1Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P. R. China.

Science Advances
|September 21, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel ferromagnetic/antiferromagnetic FeRh spin homojunction, achieving high interfacial transparency and spin torque efficiency. This design minimizes spin memory loss and two-magnon scattering for energy-efficient spintronic devices.

More Related Videos

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

9.2K
Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
09:30

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Published on: June 28, 2017

9.7K

Related Experiment Videos

Last Updated: Aug 28, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
08:48

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

Published on: September 25, 2020

5.8K
Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

9.2K
Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells
09:30

Electrospinning of Photocatalytic Electrodes for Dye-sensitized Solar Cells

Published on: June 28, 2017

9.7K

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Spintronics

Background:

  • Efficient spin-charge conversion is crucial for low-energy spintronic devices.
  • Traditional heterojunctions suffer from spin memory loss (SML) and two-magnon scattering (TMS) due to interfacial Rashba spin-orbit coupling.
  • These phenomena quench spin current, limiting device performance.

Purpose of the Study:

  • To design a novel spin homojunction overcoming the limitations of traditional heterojunctions.
  • To achieve efficient spin-charge conversion with high interfacial transparency.
  • To reduce spin memory loss and two-magnon scattering for enhanced spintronic device functionality.

Main Methods:

  • Fabrication and characterization of a ferromagnetic FeRh/antiferromagnetic FeRh spin homojunction.
  • Spin pumping measurements to determine interfacial transparency and spin torque efficiency.
  • First-principles calculations to analyze interfacial electric fields and spin-orbit coupling.

Main Results:

  • The designed spin homojunction exhibited a high interfacial transparency of 0.75.
  • A high spin torque efficiency of 0.34 was achieved, verified by spin pumping measurements.
  • First-principles calculations revealed a significantly smaller interfacial electric field in the homojunction, drastically reducing SML and TMS.

Conclusions:

  • The FeRh spin homojunction effectively minimizes interfacial spin-orbit coupling, reducing SML and TMS.
  • This novel design demonstrates potential for future energy-efficient spintronic devices.
  • The study provides a promising strategy for enhancing spin-charge conversion efficiency at interfaces.