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Related Concept Videos

Magnetic Damping01:17

Magnetic Damping

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Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
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Lenz's Law01:15

Lenz's Law

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The direction in which the induced emf drives the current around a wire loop can be found through the negative sign. However, it is usually easier to determine this direction with Lenz's law, named in honor of its discoverer, Heinrich Lenz (1804–1865). Lenz's law states that the direction of the induced emf drives the current around a wire loop always to oppose the change in magnetic flux that causes the emf.
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Diamagnetism01:26

Diamagnetism

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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.
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Types Of Superconductors

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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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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Inverse-design magnonic devices.

Qi Wang1, Andrii V Chumak2, Philipp Pirro3

  • 1Faculty of Physics, University of Vienna, Vienna, Austria. qi.wang@univie.ac.at.

Nature Communications
|May 12, 2021
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Summary
This summary is machine-generated.

Inverse-design magnonics enables custom device creation for spin wave data processing. This computational approach designs magnonic devices for diverse functionalities, optimizing low-power information technologies.

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Area of Science:

  • Physics
  • Materials Science
  • Computer Science

Background:

  • Magnonics utilizes spin waves (magnons) for low-power information processing, offering an alternative to electron-based systems.
  • Current magnonic device development is often function-specific, requiring tailored designs for each application.

Purpose of the Study:

  • Introduce a novel inverse-design method for magnonics.
  • Enable the creation of versatile magnonic devices through a computational feedback algorithm.
  • Demonstrate the algorithm's capability across various magnonic functionalities.

Main Methods:

  • Developed a feedback-based computational algorithm for inverse design.
  • Utilized micromagnetic simulations for method validation.
  • Designed a proof-of-concept prototype using a patterned ferromagnetic material with square voids.

Main Results:

  • Successfully designed magnonic devices for linear, nonlinear, and nonreciprocal functionalities.
  • Created a magnonic (de-)multiplexer, a nonlinear switch, and a circulator using the same inverse-design algorithm.
  • Validated the universality and effectiveness of the inverse-design approach.

Conclusions:

  • Inverse-design magnonics offers a universal method for creating specialized magnonic devices.
  • This approach can accelerate the development of efficient radio-frequency applications.
  • The method supports the creation of building blocks for Boolean and neuromorphic computing.