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Related Concept Videos

Inductors01:11

Inductors

377
An inductor is a passive component built to store energy within its magnetic field. It can be fabricated by coiling a wire around a magnetic core. When current is permitted to flow through this inductor, it is observed that the voltage across the inductor is directly proportional to the time rate of change of the current. Mathematically,
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Inductor in an AC Circuit01:16

Inductor in an AC Circuit

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The basic components of an inductor are coils or loops of wire that are either wound around a hollow tube former or a ferromagnetic material (iron-cored) to increase their inductive value or inductance. When a voltage is applied across an inductor's terminals, a magnetic field is created, where the inductor stores its energy. The inductor's own self-induced or back emf value controls the growth of the current flowing through it.  This back emf voltage is proportional to the rate of...
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Types Of Superconductors01:28

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...
927
Energy Stored in Inductors01:16

Energy Stored in Inductors

304
An inductor is ingeniously crafted to accumulate energy within its magnetic field. This field is a direct result of the current that meanders through its coiled structure. When this current maintains a steady state, there is no detectable voltage across the inductor, prompting it to mimic the behavior of a short circuit when faced with direct current.
In terms of gauging the energy stored within an inductor, it is equivalent to the integral of the power delivered at every individual moment, all...
304
Inductance: Solid Cylindrical Conductor01:24

Inductance: Solid Cylindrical Conductor

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To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
Given the uniform current distribution, the magnetic field Hx and flux density Bx inside the conductor are...
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Series and Parallel Inductors01:17

Series and Parallel Inductors

385
In electrical circuits, integrating inductors into the toolkit of passive elements requires navigating the intricacies of series and parallel combinations involving these components. Practical circuits often feature configurations of multiple inductors, and understanding how to determine their equivalent inductance is vital.
For a series connection of N inductors, each carrying the same current, applying Kirchhoff's voltage law unveils a crucial relationship. Substituting the expression for...
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YBa2Cu3O7 as a high-temperature superinductor.

Yogesh Kumar Srivastava1,2,3, Teng Chen Ietro Pang1,2, Manoj Gupta1,2

  • 1Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore.

Nature Materials
|February 5, 2025
PubMed
Summary
This summary is machine-generated.

We discovered Pearl inductance, a new kinetic inductance in superconductors. This phenomenon enhances terahertz superinductance in YBCO thin films, exceeding quantum resistance limits for advanced electronic and quantum devices.

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Area of Science:

  • Condensed Matter Physics
  • Superconductivity
  • Materials Science

Background:

  • Type-II superconductors exhibit magnetic behavior explained by quantum vortices.
  • In thin films (thickness t < London penetration depth λL), Pearl vortices dominate, with a 1/r2 field decay extending to the Pearl length (PL).
  • The impact of Pearl vortices on kinetic inductance enhancement remained underexplored.

Purpose of the Study:

  • To investigate the effect of Pearl vortices on kinetic inductance in superconducting thin films.
  • To explore the potential for enhanced superinductance at the Pearl length scale.
  • To demonstrate novel applications in electronic, photonic, and quantum devices.

Main Methods:

  • Fabrication of ultrathin metamaterial resonators using high-transition-temperature (Tc) YBCO superconductor thin films.
  • Characterization of the magnetic and electrical properties of the resonators.
  • Analysis of vortex screening supercurrents and kinetic inductance.

Main Results:

  • Discovery of Pearl inductance, a novel form of kinetic inductance.
  • Observed extension of vortex screening supercurrents from λL to 14λL in ultrathin films (thickness λL/7).
  • Achieved terahertz superinductance with device impedance exceeding the quantum resistance limit (RQ) by 33%.

Conclusions:

  • Pearl inductance significantly enhances kinetic inductance in superconducting thin films.
  • This effect enables unprecedented superinductance at the terahertz frequency range.
  • The findings pave the way for advanced electronic, photonic, and quantum technologies.