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Related Concept Videos

Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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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.
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All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
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In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
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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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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 one, the...
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Magnetoelastic Coupling-Driven Chiral Spin Textures: A Skyrmion-Antiskyrmion-like Array.

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|March 1, 2026
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Strong magnetoelastic coupling can induce chiral spin textures, like skyrmion-antiskyrmion lattices, in 2D ferromagnetic systems. This occurs without Dzyaloshinskii-Moriya interaction, offering new pathways for spintronic material design.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Spintronics

Background:

  • Uniform spin systems typically lack intrinsic chirality.
  • Dzyaloshinskii-Moriya interaction is a common driver of chiral spin textures.
  • Magnetoelastic coupling relates magnetic properties to mechanical strain.

Purpose of the Study:

  • To theoretically demonstrate a novel mechanism for spontaneous chiral spin texture formation.
  • To investigate the role of magnetoelastic coupling in creating skyrmion-like structures.
  • To explore conditions for emergent chirality in ferromagnetic systems.

Main Methods:

  • Theoretical modeling of a two-dimensional ferromagnetic system on a substrate.
  • Analysis of spin configurations under varying magnetoelastic coupling strengths.
  • Investigation of the influence of flexural phonon-substrate coupling.

Main Results:

  • Sufficiently strong magnetoelastic coupling drives uniform spin systems to chiral configurations.
  • Periodic arrays of skyrmion-antiskyrmion lattices emerge spontaneously.
  • Chirality formation is independent of Dzyaloshinskii-Moriya interaction.
  • Emergence is favored by strong magnetoelastic coupling and weak flexural phonon-substrate coupling.

Conclusions:

  • Magnetoelastic coupling provides a new, intrinsic mechanism for generating chiral spin textures.
  • Emergent skyrmion-antiskyrmion lattices offer potential applications in spintronics.
  • Materials with strong magnetoelastic responses are promising for novel magnetic phenomena.