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Ferromagnetism01:31

Ferromagnetism

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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...
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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 Susceptibility and Permeability01:31

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In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
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Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

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In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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Types Of Superconductors01:28

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A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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Magnetic Field Due to Two Straight Wires01:18

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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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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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Magnetic Interconnects Based on Composite Multiferroics.

Alexander Khitun1

  • 1Electrical Engineering Department, University of California Riverside, Riverside, CA 92521, USA.

Micromachines
|November 24, 2022
PubMed
Summary

We developed a novel magnetic interconnect using multiferroic composites for magnetic logic devices. This design enables constant amplitude magnetic signal transmission, overcoming damping issues in conventional technologies.

Keywords:
interconnectsmagnetic logic devicessynthetic multiferroic

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Electrical Engineering

Background:

  • Magnetic logic devices require efficient magnetic signal transmission.
  • Conventional interconnects face challenges like fast signal damping.
  • Novel interconnects are crucial for advancing magnetic computing.

Purpose of the Study:

  • To introduce a new magnetic interconnect based on composite multiferroics.
  • To enable constant amplitude magnetic signal propagation.
  • To address signal damping issues in magnetic data transmission.

Main Methods:

  • Utilized a composite multiferroic material combining piezoelectric and magnetostrictive properties.
  • Modeled the interconnect as a parallel plate capacitor with a magnetoelastic material.
  • Employed the Landau-Lifshitz-Gilbert equation with electric field-dependent anisotropy for numerical simulations.

Main Results:

  • Demonstrated constant magnetic signal amplitude during propagation via stress-mediated coupling.
  • Achieved estimated magnetic signal group velocities up to 10^5 m/s.
  • Calculated low energy dissipation below 10^-18 J per bit per 100 nm.

Conclusions:

  • The proposed multiferroic interconnect offers reliable, low-energy magnetic data transmission.
  • This technology can benefit various magnetic logic devices and architectures.
  • Further research is needed to address physical limits and practical implementation challenges.