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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

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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...
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Diamagnetism01:26

Diamagnetism

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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....
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Paramagnetism01:30

Paramagnetism

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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...
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Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
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Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

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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...
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Types Of Superconductors01:28

Types Of Superconductors

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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...
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Related Experiment Video

Updated: Jul 6, 2025

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

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Emerging Antiferromagnets for Spintronics.

Hongyu Chen1, Li Liu1, Xiaorong Zhou1

  • 1School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.

Advanced Materials (Deerfield Beach, Fla.)
|January 6, 2024
PubMed
Summary
This summary is machine-generated.

Antiferromagnetic spintronics, using materials with complex crystal structures, offers superior device performance. Recent breakthroughs demonstrate controllable antiferromagnetic order and novel functionalities for next-generation spintronic devices.

Keywords:
antiferromagnetsmagnetoelectronic effectsspin splittingspintronicstunneling magnetoresistance effect

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Electrical Engineering

Background:

  • Antiferromagnets are emerging as key materials for advanced spintronic devices due to their inherent stability and fast dynamics.
  • Historically, their compensated magnetization was thought to limit spintronic applications, but recent discoveries challenge this view.
  • The unique complex crystal structures of antiferromagnets offer vast potential for novel phenomena and functionalities.

Purpose of the Study:

  • To review recent advancements in antiferromagnetic spintronics.
  • To highlight progress based on antiferromagnets with specialized crystal structures.
  • To provide an outlook on future research directions in this field.

Main Methods:

  • Review of recent literature on antiferromagnetic spintronics.
  • Focus on manipulation of antiferromagnetic order.
  • Exploration of novel physical responses and device prototypes.

Main Results:

  • Demonstration of efficient manipulation of antiferromagnetic order.
  • Discovery of novel physical responses in antiferromagnetic materials.
  • Successful development of prototype antiferromagnetic spintronic devices.

Conclusions:

  • Antiferromagnets, particularly those with complex crystal structures, are viable for next-generation spintronics.
  • Continued research into manipulating antiferromagnetic order and exploring new phenomena is crucial.
  • This field holds significant promise for future spintronic technologies.