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Related Concept Videos

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...
Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
Ferromagnetism01:31

Ferromagnetism

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...
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.
Magnetic Force01:18

Magnetic Force

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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Updated: Jun 23, 2026

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization
07:14

Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization

Published on: October 6, 2019

Magnetic logic using nanowires with perpendicular anisotropy.

J Jaworowicz1, N Vernier, J Ferré

  • 1Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris-Sud, Orsay, France.

Nanotechnology
|May 9, 2009
PubMed
Summary

Researchers developed a novel magnetic logic gate using nanowires. This device performs a

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Area of Science:

  • Physics, Materials Science, Nanotechnology

Background:

  • Magnetic domain walls in nanowires offer potential for data storage and logic operations.
  • Existing methods for magnetic logic face challenges in efficiency and scalability.

Purpose of the Study:

  • To demonstrate a novel pure magnetic logic operation using nanowires with perpendicular anisotropy.
  • To realize the 'NOT' logic function based on controlled domain wall creation.

Main Methods:

  • Utilizing magnetic nanowires with perpendicular magnetic anisotropy.
  • Exploiting the dipolar interaction between adjacent nanowires to nucleate domain walls.
  • Experimental validation of the magnetic logic gate concept on prototypes.

Main Results:

  • Successfully implemented a 'NOT' logic gate using magnetic nanowire interactions.
  • Observed domain wall nucleation driven by dipolar coupling between neighboring wires.
  • Experimental results align with theoretical predictions for the magnetic logic operation.

Conclusions:

  • A new method for pure magnetic logic operations using nanowires has been successfully demonstrated.
  • The 'NOT' gate functionality is achievable through controlled domain wall generation via dipolar interactions.
  • This approach shows promise for future magnetic-based computing architectures.