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Related Concept Videos

Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

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...
Magnetic Fields01:27

Magnetic Fields

A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
Energy In A Magnetic Field01:24

Energy In A Magnetic Field

If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus negligible.
The energy...
Magnetic Field due to Moving Charges01:23

Magnetic Field due to Moving Charges

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...
Diamagnetism01:26

Diamagnetism

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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How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters
08:42

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Published on: April 16, 2015

Magnetizing a complex plasma without a magnetic field.

H Kählert1, J Carstensen, M Bonitz

  • 1Heinrich-Heine-Universität Düsseldorf, Institut für Theoretische Physik II: Weiche Materie, Düsseldorf, Germany.

Physical Review Letters
|October 30, 2012
PubMed
Summary
This summary is machine-generated.

Researchers created a novel method to simulate magnetized dusty plasmas using rotating gas. This technique uses gas-plasma friction to control dust rotation, mimicking magnetic fields without affecting light particles.

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Last Updated: May 17, 2026

How to Ignite an Atmospheric Pressure Microwave Plasma Torch without Any Additional Igniters
08:42

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Published on: April 16, 2015

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A 100 KW Class Applied-field Magnetoplasmadynamic Thruster
11:47

A 100 KW Class Applied-field Magnetoplasmadynamic Thruster

Published on: December 22, 2018

Area of Science:

  • Plasma Physics
  • Complex Plasmas
  • Dusty Plasma Dynamics

Background:

  • Magnetization of heavy dust particles is crucial for understanding complex plasma behavior.
  • Simulating magnetized dusty plasmas often requires strong magnetic fields, which can be difficult to achieve and control.
  • Existing methods may affect the properties of light plasma species.

Purpose of the Study:

  • To propose and demonstrate a new concept for mimicking the magnetization of heavy dust particles in complex plasmas.
  • To achieve controlled rotation of dust clouds without significantly altering light species properties.
  • To provide an alternative method for studying magnetized dusty plasma phenomena.

Main Methods:

  • Utilizing frictional coupling between a complex plasma and a neutral gas.
  • Transferring angular momentum from a rotating neutral gas column to dust particles.
  • Inducing a Coriolis force in the dust cloud to simulate the Lorentz force in a magnetic field.

Main Results:

  • Successfully demonstrated a concept that mimics dust magnetization in complex plasmas.
  • Observed that light plasma species properties remain practically unaffected.
  • Experimental normal mode measurements for a four-particle dust cluster showed excellent agreement with theoretical predictions for magnetized plasmas.

Conclusions:

  • The proposed method effectively mimics the effects of magnetization on heavy dust particles in complex plasmas.
  • The Coriolis force induced by gas-plasma friction serves as a viable analog to the Lorentz force.
  • This technique offers a promising, potentially simpler, alternative for studying magnetized dusty plasma systems.