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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

2.5K
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

2.5K
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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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...
12.5K
Paramagnetism01:30

Paramagnetism

2.6K
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...
2.6K
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

1.2K
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...
1.2K
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

9.4K
A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
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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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Ferrimagnetic spintronics.

Se Kwon Kim1, Geoffrey S D Beach2, Kyung-Jin Lee3,4,5

  • 1Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea.

Nature Materials
|December 24, 2021
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Summary
This summary is machine-generated.

Ferrimagnets offer a unique combination of ferromagnet and antiferromagnet properties for advanced spintronics. This review highlights their potential in spin transport, dynamics, and optical switching for high-density devices.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Ferrimagnetic materials are gaining attention for spintronics applications.
  • They combine advantages of ferromagnets and antiferromagnets.

Purpose of the Study:

  • To review recent advancements in ferrimagnetic spintronics.
  • To focus on key functionalities like spin transport, dynamics, and optical switching.

Main Methods:

  • Literature review of recent research in ferrimagnetic spintronics.
  • Analysis of experimental and theoretical studies.

Main Results:

  • Ferrimagnets exhibit tunable net magnetization for easy control and detection.
  • Antiferromagnetic-like dynamics in ferrimagnets are faster than ferromagnetic dynamics.
  • Potential for high-density data storage and processing devices.

Conclusions:

  • Ferrimagnetic spintronics is a rapidly developing field with significant potential.
  • Key functionalities like spin transport, spin texture dynamics, and all-optical switching are promising.
  • Ferrimagnets are poised to enable next-generation spintronic devices.