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

Magnetic Damping01:17

Magnetic Damping

415
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
415
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
Eddy Currents01:25

Eddy Currents

1.5K
Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
1.5K
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

2.0K
A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
2.0K
Diamagnetism01:26

Diamagnetism

2.4K
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....
2.4K
Types Of Superconductors01:28

Types Of Superconductors

921
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
921

You might also read

Related Articles

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

Sort by
Same author

Termination-Preserved Ultrahigh Tunneling Magnetoresistance in Altermagnetic KV<sub>2</sub>Se<sub>2</sub>O.

ACS nano·2026
Same author

Polar nano-regions enable large spin Hall conductivity in metallic PtCoO<sub>2</sub>.

Nature materials·2026
Same author

Large Temperature-invariant Anomalous Nernst Effect in Non-collinear Antiferromagnet Mn<sub>3</sub>Pt.

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

Spin-Orbit Torque Induced by Switchable Crystal Inversion Symmetry Breaking.

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

Beyond Kelvin's Relation: A Giant Transverse Thomson Response for Efficient Cryogenic Cooling.

Journal of the American Chemical Society·2026
Same author

Unconventional magnon-mediated spin torque enabled by ferroelectric domain engineering in multiferroic BiFeO<sub>3</sub>.

Nature communications·2026
Same journal

Intrinsic Superconducting Gap in Bilayer KCa<sub>2</sub>Fe<sub>4</sub>As<sub>4</sub>F<sub>2</sub> and Decoupled Monolayer FeAs.

Nano letters·2026
Same journal

Programmable Hydrogen-Assisted Chemical Vapor Deposition Growth and Bipolar Transport in Two-Dimensional MoO<sub>2</sub> Nanoflakes.

Nano letters·2026
Same journal

A Curvature-Modulated Strategy for Single-Atom Catalysts toward Reciprocal Regulation in Li-S Batteries.

Nano letters·2026
Same journal

Vacuum Pyrolysis Engineered CoSb/C Scaffold for Sodium Metal Anodes with Sodiophilic and Superionic Interphase.

Nano letters·2026
Same journal

Hexagonal SiGe Quantum Dots in Nanowires.

Nano letters·2026
Same journal

Monolithic Axial InGaAs Quantum Dot Emitters in GaAs-Based Nanowires via Sb-Mediated Facet Engineering.

Nano letters·2026
See all related articles

Related Experiment Video

Updated: May 27, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.6K

Spin Filtering with Insulating Altermagnets.

Kartik Samanta1, Ding-Fu Shao2, Evgeny Y Tsymbal1

  • 1Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588-0299, United States.

Nano Letters
|February 17, 2025
PubMed
Summary
This summary is machine-generated.

Altermagnetic insulators offer a novel approach for antiferromagnetic spintronics. These materials enable momentum-dependent spin filtering, leading to significant tunneling magnetoresistance effects in next-generation devices.

Keywords:
Spin filteringaltermagnetinsulatormagnetic tunnel junctionspintronicstunneling

More Related Videos

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
06:27

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Published on: July 2, 2018

8.0K
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

2.6K

Related Experiment Videos

Last Updated: May 27, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.6K
Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
06:27

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Published on: July 2, 2018

8.0K
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

2.6K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Altermagnetic (AM) materials exhibit unique momentum-dependent spin splitting.
  • Research has primarily focused on AM metals and semiconductors, neglecting AM insulators.
  • Antiferromagnetic (AFM) spintronics seeks novel materials for advanced functionalities.

Purpose of the Study:

  • To explore the potential of altermagnetic insulators (AMIs) as efficient spin-filter materials.
  • To investigate the spin- and momentum-dependent properties of evanescent states in AMIs.
  • To predict the performance of spin-filter magnetic tunnel junctions (SF-MTJs) using AMIs.

Main Methods:

  • Complex band structure analysis of rutile-type altermagnets MF2 (M = Fe, Co, Ni).
  • Modeling spin-filter tunneling across a spin-dependent potential barrier.
  • Estimation of tunneling magnetoresistance (TMR) in SF-MTJs with AMIs.

Main Results:

  • Evanescent states in AMIs show spin- and momentum-dependent decay rates.
  • This leads to momentum-dependent spin polarization of tunneling currents.
  • Predicted TMR ratios of 150-170% for CoF2 and NiF2 based SF-MTJs.

Conclusions:

  • AMIs are viable alternatives to conventional spin-filter materials.
  • The findings pave the way for next-generation AFM spintronic devices.
  • Tuning Fermi energy near the valence band maximum enhances TMR in SF-MTJs.