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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...
Divergence and Curl of Magnetic Field01:26

Divergence and Curl of Magnetic Field

The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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...
Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

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...
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...

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Related Experiment Video

Updated: May 17, 2026

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
06:27

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

Published on: July 2, 2018

Topology-orientation separability in dual-vortex-driven magnetization.

Zhilong Zhou, Han Lin, Baohua Jia

    Optics Letters
    |May 15, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Researchers achieved independent control over magnetic texture topology and orientation using structured light. This breakthrough enables precise manipulation of three-dimensional magnetization patterns for advanced applications.

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    Scanning SQUID Study of Vortex Manipulation by Local Contact
    06:53

    Scanning SQUID Study of Vortex Manipulation by Local Contact

    Published on: February 1, 2017

    Related Experiment Videos

    Last Updated: May 17, 2026

    Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques
    06:27

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

    Published on: July 2, 2018

    Scanning SQUID Study of Vortex Manipulation by Local Contact
    06:53

    Scanning SQUID Study of Vortex Manipulation by Local Contact

    Published on: February 1, 2017

    Area of Science:

    • Optics and Photonics
    • Condensed Matter Physics
    • Materials Science

    Background:

    • Structured light offers unique properties for manipulating matter.
    • Controlling magnetization textures in three dimensions is crucial for advanced magnetic devices.
    • The inverse Faraday effect links light polarization to magnetization.

    Purpose of the Study:

    • To demonstrate topology-orientation separability in structured-light-driven magnetization.
    • To develop a method for deterministic steering of 3D magnetization textures.
    • To enable scalable twisted magnetization lattices.

    Main Methods:

    • Utilizing a tight-focusing regime with structured light.
    • Exploiting nonparaxial transverse-longitudinal coupling to generate twisted optical spin density.
    • Employing a nonzero vortex-charge mismatch (Δm) and a tilt-angle pair (β1, β2) for control.

    Main Results:

    • Achieved independent control over magnetization topology and orientation.
    • Demonstrated that Δm defines the twisted topology, while tilt angles control global orientation.
    • Showcased the ability to create deterministic 3D magnetization textures and scalable lattices.

    Conclusions:

    • Topology and orientation of magnetization can be independently controlled using structured light.
    • A minimal two-parameter framework enables multidimensional opto-magnetic control.
    • This approach facilitates the development of novel magnetic materials and devices.