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Videos de Conceptos Relacionados

Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
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...
Faraday Disk Dynamo01:23

Faraday Disk Dynamo

A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
Toroids01:27

Toroids

A toroid is a closely wound donut-shaped coil constructed using a single conducting wire. In general, it is assumed that a toriod consists of multiple circular loops perpendicular to its axis.
When connected to a supply, the magnetic field generated in the toroid has field lines circular and concentric to its axis. Conventionally, the direction of this magnetic field is expressed using the right-hand rule. If the fingers of the right hand curl in the current direction, the thumb points in the...
Magnetic Vector Potential01:15

Magnetic Vector Potential

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...
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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Video Experimental Relacionado

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Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

Las solitones son gotas magnéticas generadas por el par de giro generadas por solitones.

S M Mohseni1, S R Sani, J Persson

  • 1Materials Physics, School of Information and Communication Technology, KTH Royal Institute of Technology, Kista, Sweden.

Science (New York, N.Y.)
|March 16, 2013
PubMed
Resumen

Los investigadores observaron solitones de gotas magnéticas, un raro análogo magnético de los solitones disipables, utilizando un par de transferencia de espín. Estos solitones exhiben dinámicas complejas y pueden ser controlados por campos de corriente y magnéticos para aplicaciones de espintrónica.

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Área de la Ciencia:

  • Física de la materia condensada Física de la materia condensada
  • Spintronics es una empresa de Spintronics.
  • La dinámica no lineal es la dinámica no lineal.

Sus antecedentes:

  • Los solitones disipativos son fenómenos no lineales observados en varios sistemas.
  • La observación experimental de los análogos magnéticos de los solitones disipativos ha sido un desafío.
  • Las películas delgadas de anisotropía magnética perpendicular (PMA) son cruciales para los dispositivos espintrónicos.

Objetivo del estudio:

  • Observar y caracterizar experimentalmente las solitones de gotas magnéticas.
  • Para investigar las propiedades dinámicas de estos solitones magnéticos.
  • Explorar las aplicaciones potenciales en la espintrónica y la magnónica.

Principales métodos:

  • Torque de transferencia de espín utilizado debajo de un nanocontacto en una película delgada magnética PMA.
  • Empleó simulaciones micromagnéticas para analizar la dinámica de solitones.
  • Mecanismos de control investigados utilizando corriente eléctrica y campos magnéticos.

Principales resultados:

  • Generó con éxito solitones de gotas magnéticas disipables.
  • Se observaron diversos comportamientos dinámicos, incluyendo el movimiento oscilatorio, el giro y los estados de respiración.
  • Se ha demostrado la controlabilidad de los solitones gotas a través de la corriente y los campos magnéticos.

Conclusiones:

  • El estudio informa de la primera observación experimental de solitones de gotas magnéticas.
  • Estos solitones exhiben una dinámica rica y controlable.
  • Las aplicaciones potenciales incluyen dispositivos avanzados de spintronic, magnonic y domain-wall.