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Related Concept Videos

Magnetism01:30

Magnetism

6.2K
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...
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Magnetic Vector Potential01:15

Magnetic Vector Potential

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In electrostatics, the electric field can be written as the negative gradient of the potential. In magnetostatics, the zero divergence of the magnetic field ensures that the magnetic field can be expressed as the curl of a vector potential. This potential is known as the magnetic vector potential.
Consider an ideal solenoid with n turns per unit length and radius R. If I is the current through the solenoid, the magnetic field inside the solenoid is expressed as the product of vacuum...
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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.
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...
8.4K
Magnetic Field Of A Current Loop01:16

Magnetic Field Of A Current Loop

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Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
4.4K
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...
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Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

3.5K
Two long, straight, and parallel current-carrying conductors exert a force of equal magnitude on one another. The direction of the force depends on the current direction in the conductors.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
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Updated: Jun 3, 2025

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

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Magnetic vortex: fundamental physics, developments, and device applications.

Payal Bhattacharjee1, Sucheta Mondal2, Susmita Saha3

  • 1Department of Basic Science and Humanities, Institute of Engineering & Management, Salt Lake Electronics Complex, Sector V, Salt Lake, Kolkata 700091, India.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|January 9, 2025
PubMed
Summary
This summary is machine-generated.

Magnetic vortices are key spin textures in condensed matter physics. This review explores their fundamental properties and spintronic applications in data storage and computing.

Keywords:
Landau-Lifshitz-Gilbert equationmagnetic vortexmagnetizationmagnetization dynamicsspin wavesspin-transfer torquespintronics

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Area of Science:

  • Condensed Matter Physics
  • Spintronics

Background:

  • Magnetic vortices are topologically nontrivial spin textures, often ground states in anisotropic ferromagnets.
  • They exhibit thermal stability, tunable core polarity, and ease of patterning.

Purpose of the Study:

  • To provide an overview of recent advancements in magnetic vortex understanding.
  • To explore vortex-based spintronic applications in data storage and computing.

Main Methods:

  • Review of fundamental physics of magnetic vortices.
  • Analysis of recent developments in vortex-based spintronic devices.

Main Results:

  • Magnetic vortices offer potential for high-density data storage and energy-efficient computing.
  • Vortex-based devices show promise for magnetic field sensors and logic operations.

Conclusions:

  • A comprehensive understanding of magnetic vortices is crucial for realizing advanced spintronic devices.
  • This review highlights the potential of vortex-based technologies in modern electronics.