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

Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

921
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...
921
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

994
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...
994
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

644
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
644
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

1.3K
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...
1.3K
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

644
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
644
Ferromagnetism01:31

Ferromagnetism

2.4K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.4K

You might also read

Related Articles

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

Sort by
Same author

Pressure-Driven Dimensional Modulation of Phase Transitions and Superconductivity in Black Phosphorus.

Nano letters·2026
Same author

Author Correction: Bose-Einstein condensation of a two-magnon bound state in a spin-1 triangular lattice.

Nature materials·2026
Same author

High thermal conductivity in metallic <i>θ</i>-TaN single crystals.

National science review·2026
Same author

Retina-Inspired Bi-Based Terahertz Photonic Neuromorphic Devices.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Grain boundary stabilization of fluorite ferroelectrics.

Nature materials·2026
Same author

Precise structure and polarization determination of Hf<sub>0.5</sub>Zr<sub>0.5</sub>O<sub>2</sub> with electron ptychography.

Nature communications·2026

Related Experiment Video

Updated: Jun 21, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.1K

Syntropic spin alignment at the interface between ferromagnetic and superconducting nitrides.

Qiao Jin1, Qinghua Zhang1, He Bai2

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

National Science Review
|July 15, 2024
PubMed
Summary

We observed a large induced magnetic moment at superconductor/ferromagnet interfaces, crucial for spintronics. This moment, parallel to the ferromagnet, arises from direct exchange coupling at nitride interfaces.

Keywords:
magnetic proximity effectsnitride interfacespolarized neutron reflectometrysuperconducting spintronicssuperconductor/ferromagnetic interfaces

More Related Videos

Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

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

Published on: July 20, 2022

2.7K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

9.6K

Related Experiment Videos

Last Updated: Jun 21, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.1K
Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
07:42

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

Published on: July 20, 2022

2.7K
Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

9.6K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Information Science

Background:

  • Magnetic correlations at superconductor/ferromagnet (S/F) interfaces are vital for advanced spintronic devices like triplet-supercurrent spin-valves and 'π' Josephson junctions.
  • Understanding interfacial magnetic behavior is key to developing dissipation-less spin-based logic and memory technologies.

Purpose of the Study:

  • To investigate the magnetic proximity effects at high-quality nitride superconductor/ferromagnet interfaces.
  • To quantitatively determine the induced magnetic moment and its properties within the superconductor.

Main Methods:

  • Polarized neutron reflectometry (PNR) to probe magnetization profiles.
  • Direct current superconducting quantum interference device (DC SQUID) measurements.
  • First-principles calculations to elucidate the underlying physical mechanisms.

Main Results:

  • Observation of a significant induced magnetic moment at nitride S/F interfaces, existing only below the critical temperature (TC).
  • The induced magnetic moment in the superconductor was found to be parallel to the ferromagnet's magnetization, contrary to previous findings in other S/F systems.
  • Heisenberg direct exchange coupling via d-orbital overlapping and charge transfer were identified as the cause of this unusual spin texture.

Conclusions:

  • The study provides a novel experimental method for analyzing magnetic proximity in S/F interfaces.
  • The findings establish a foundational understanding of interfacial magnetism crucial for superconducting spintronics.
  • The observed phenomena offer a prototype epitaxial building block for future superconducting spintronic applications.