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Related Concept Videos

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...
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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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Magnetism01:30

Magnetism

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Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
6.3K
Paramagnetism01:30

Paramagnetism

2.5K
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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Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
262
Magnetic Force01:18

Magnetic Force

907
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
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Related Experiment Video

Updated: Jun 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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2025 roadmap on 3D nanomagnetism.

Gianluca Gubbiotti1, Anjan Barman2, Sam Ladak3

  • 1CNR-Istituto Officina dei Materiali (IOM), Perugia, Italy.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 22, 2024
PubMed
Summary
This summary is machine-generated.

This roadmap outlines the emerging field of three-dimensional (3D) nanomagnetism, detailing fabrication, imaging, and computational methods for next-generation technologies like advanced memory and computing.

Keywords:
analytical methodscomputational approachesfabrication techniquesimaging methodsnanomagnetismthree-dimensional nanomagnetism

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • The field of nanomagnetism is transitioning from planar to three-dimensional (3D) structures.
  • 3D nanomagnetism offers potential for advanced technologies including ultrahigh-density storage, memory, logic, and neuromorphic computing.

Purpose of the Study:

  • To provide a comprehensive roadmap for the emerging field of 3D nanomagnetism.
  • To foster interdisciplinary collaboration among researchers in materials science, physics, engineering, and computing.
  • To address key challenges and identify future opportunities in 3D nanomagnetism.

Main Methods:

  • Exploration of advanced fabrication techniques (e.g., two-photon lithography, focused electron beam-induced deposition).
  • Utilization of cutting-edge imaging methods (e.g., electron holography, synchrotron x-ray tomography) for nanoscale resolution.
  • Application of analytical and numerical methods (e.g., finite element methods) for investigating complex 3D structures.

Main Results:

  • Discussion of diverse 3D magnetic systems, including artificial spin-ice, topological spin textures, and molecular magnets.
  • Investigation of 3D magnonic crystals and networks for applications in magnonic circuits and spintronics.
  • Highlighting computational approaches for faster, energy-efficient computing using 3D nanomagnetic systems.

Conclusions:

  • 3D nanomagnetism is a rapidly advancing field with significant potential for technological innovation.
  • A collaborative roadmap is essential to overcome challenges and unlock the full capabilities of 3D nanomagnetic systems.
  • Future research directions include exploring complex spin textures, curvilinear systems, and magnonic applications.