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Magnetic Field Due To A Thin Straight Wire01:28

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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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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.
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Strain Induced Vortex Core Switching in Planar Magnetostrictive Nanostructures.

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We demonstrate electric field control of magnetic vortex core reversal using strain gradients in Galfenol. This method offers a new pathway for magnetic storage devices and microwave oscillators.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Magnetic vortex cores are crucial for microwave oscillators and magnetic storage.
  • Controlling vortex core dynamics is essential for device applications.

Purpose of the Study:

  • To propose and validate a novel method for magnetic vortex core reversal.
  • To investigate electric field control of magnetization reversal via strain gradients.

Main Methods:

  • Micromagnetic simulations were employed to model the system.
  • A time-varying strain gradient was applied to Fe(81)Ga(19) (Galfenol) coupled to a piezoelectric layer.

Main Results:

  • Deterministic magnetization reversal of the vortex core was achieved.
  • Electric field control of time-dependent strain-induced anisotropy was demonstrated.

Conclusions:

  • Strain gradient application provides a new route for vortex core manipulation.
  • This technique holds promise for advanced magnetic storage and spintronic devices.