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Related Concept Videos

Magnetic Fields01:27

Magnetic Fields

6.0K
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...
6.0K
Divergence and Curl of Magnetic Field01:26

Divergence and Curl of Magnetic Field

4.5K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
4.5K
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...
924
Diamagnetism01:26

Diamagnetism

2.8K
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....
2.8K
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

1.9K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.9K
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

1.1K
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.
1.1K

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Related Experiment Video

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Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
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Reflections on the magnetic pair distribution function.

William Ratcliff1

  • 1NIST Center for Neutron Research, NIST, Gaithersburg, MD 20899, United States.

Acta Crystallographica. Section A, Foundations and Advances
|January 15, 2014
PubMed
Summary
This summary is machine-generated.

The total scattering method now analyzes magnetic systems, enabling the study of local magnetic order. This technique is crucial for understanding materials like multiferroics and dilute magnetic semiconductors.

Keywords:
magnetismneutron scatteringtotal scattering

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Magnetism

Background:

  • Understanding local atomic and magnetic arrangements is key in advanced materials.
  • Traditional methods often struggle to probe short-range magnetic order effectively.

Purpose of the Study:

  • To discuss the recent advancements in applying the total scattering method to magnetic systems.
  • To highlight the capability of determining the magnetic pair distribution function.

Main Methods:

  • Application of the total scattering method.
  • Analysis of scattering data to extract the magnetic pair distribution function.

Main Results:

  • The total scattering method can be successfully applied to magnetic systems.
  • The magnetic pair distribution function can be determined from total scattering data.

Conclusions:

  • The ability to determine the magnetic pair distribution function is a significant breakthrough.
  • This method facilitates the study of local order in diverse magnetic materials, including multiferroics and dilute magnetic semiconductors.