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

Ferromagnetism01:31

Ferromagnetism

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...
Diamagnetism01:26

Diamagnetism

Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets.
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

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...
Paramagnetism01:30

Paramagnetism

Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
Magnetic Fields01:27

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

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. This...

You might also read

Related Articles

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

Sort by
Same author

Obstructive Sleep Apnea and Cardiovascular Disease: Mechanisms, Diagnostics, and Emerging Therapeutic Approaches.

Biomedicines·2026
Same author

Anisotropic Ferromagnetism in CrAu<sub>3</sub>Sb<sub>6</sub>.

Chemistry of materials : a publication of the American Chemical Society·2026
Same author

Twist-Angle-Dependent Excitons in Moiré MoTe<sub>2</sub> Visualized by Cryogenic STEM and Monochromated EELS.

Nano letters·2026
Same author

Oxytocin attenuates respiratory depression and reduces mortality from fentanyl and the combination of xylazine-fentanyl in rats.

Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie·2026
Same author

Immunomodulatory functions of glutaminyl cyclases QPCTL and QPCT.

Frontiers in immunology·2026
Same author

Oxytocin treats respiratory depression and reduces mortality from fentanyl and the combination of xylazine-fentanyl.

bioRxiv : the preprint server for biology·2026
Same journal

Unlocking the capacity of Mn-based Prussian blue cathodes in capacitive deionization.

Nature communications·2026
Same journal

Scaling biodiversity-stability relationships from populations to meta-communities across trophic levels.

Nature communications·2026
Same journal

Thermodynamically programmed one-pot CRISPR platform for point-of-care SNP genotyping.

Nature communications·2026
Same journal

Engineering all-organic electrocatalysts with asymmetric dual-active sites for uncommon oxygen-evolving pathway.

Nature communications·2026
Same journal

Rapid GC content evolution in rice through GC-biased gene conversion and selection for translation efficiency.

Nature communications·2026
Same journal

Declines in organic matter persistence with increased soil carbon.

Nature communications·2026
See all related articles

Related Experiment Video

Updated: May 14, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Magneto-optical Kerr effect in an A-type antiferromagnet.

Veronika Sunko1,2,3, Salman Ahsanullah4, Vivek Jain4

  • 1Department of Physics, University of California, Berkeley, CA, USA. vsunko@ista.ac.at.

Nature Communications
|May 12, 2026
PubMed
Summary
This summary is machine-generated.

Magneto-optic Kerr effect (MOKE) is now confirmed in A-type antiferromagnets (AFMs). This discovery enables optical detection of AFM domains, expanding MOKE

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

Related Experiment Videos

Last Updated: May 14, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
08:01

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

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

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Optics

Background:

  • Magneto-optic Kerr effect (MOKE) typically probes ferromagnets and broken time-reversal symmetry.
  • MOKE observation in antiferromagnets (AFMs) is usually linked to reduced symmetry or vanishing magnetization.
  • A theoretical mechanism for intrinsic MOKE in A-type AFMs (layered AFMs with antiferromagnetic alignment) was proposed.

Purpose of the Study:

  • To experimentally confirm the intrinsic MOKE mechanism in A-type antiferromagnets.
  • To investigate the potential of MOKE for detecting AFM domains in bulk and few-layer materials.

Main Methods:

  • Experimental measurement of the imaginary component of MOKE in MnBi2Te4 (an A-type AFM) as a function of photon energy.
  • Comparison of experimental results with theoretical model calculations.

Main Results:

  • Experimental confirmation of the predicted MOKE mechanism in a bulk A-type AFM.
  • The study demonstrates that MOKE is observable in collinear A-type AFMs with out-of-plane spin order.
  • Model calculations support the experimental findings and suggest broader applicability.

Conclusions:

  • The findings validate the intrinsic MOKE mechanism in A-type AFMs.
  • This work enables optical detection of antiferromagnetic domains.
  • The scope of MOKE is expanded to include few-layer antiferromagnetic materials.