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Related Concept Videos

Force On A Current Loop In A Magnetic Field01:17

Force On A Current Loop In A Magnetic Field

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Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...
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Torque On A Current Loop In A Magnetic Field01:13

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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.
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Magnetic Force Between Two Parallel Currents01:13

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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.
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Magnetic Field Of A Current Loop01:16

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NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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Switchable spin-current source controlled by magnetic domain walls.

W Savero Torres1, P Laczkowski, V D Nguyen

  • 1INAC, CEA Grenoble , 17 avenue des Martyrs, 38054, Grenoble, France.

Nano Letters
|May 31, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed switchable pure spin current sources controlled by magnetic domain walls. This breakthrough enables new spintronic devices by manipulating spin currents in nanostructures.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Manipulation of pure spin currents in nanostructures is crucial for developing advanced spintronic devices.
  • Existing methods involve nonlocal spin injection, spin-orbit coupling, or spincaloritronic effects.

Purpose of the Study:

  • To demonstrate switchable pure spin current sources controlled by magnetic domain walls.
  • To explore the use of these sources as pure spin current detectors.

Main Methods:

  • Utilizing magnetic domain walls to control the injection of pure spin currents into nonmagnetic wires.
  • Employing a reciprocal measurement configuration to validate the device's function as a detector.

Main Results:

  • Successfully created a device where magnetic domain walls act as switchable pure spin current sources.
  • Demonstrated that the same device can function as a pure spin current detector.

Conclusions:

  • The proposed device offers a simple and easily implementable solution for spintronics applications.
  • A single current source can both induce domain wall motion and generate the spin signal, simplifying device operation.