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相关概念视频

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,
377
Inductor in an AC Circuit01:16

Inductor in an AC Circuit

2.4K
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...
2.4K
Types Of Superconductors01:28

Types Of Superconductors

927
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

195
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...
195
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...
385

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YBa2Cu3O7作为一个高温超导体.

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
概括

我们发现了珍珠电感,这是超导体中的一种新的动力电感. 这种现象在YBCO薄膜中增强了太赫兹超导,超过了先进电子和量子设备的量子阻力极限.

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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 超导电性 超导电性 超导电性
  • 材料科学 材料科学 材料科学

背景情况:

  • 二型超导体表现出由量子旋解释的磁性行为.
  • 在薄膜 (厚度t <伦敦透深度L) 中,珍珠旋占主导地位,1/r2场衰变延伸到珍珠长度 (P).
  • 珍珠对动力感应强度增强的影响仍未得到充分研究.

研究的目的:

  • 为了研究珍珠对超导薄膜中的动感应效应的影响.
  • 探索在珍珠长度尺度上增强超导的潜力.
  • 在电子,光子和量子设备中展示新的应用.

主要方法:

  • 使用高过渡温度 (Tc) YBCO超导体薄膜制造超薄的元材料共振器.
  • 对共振器的磁性和电性质的描述.
  • 对轮选超电流和动力感应的分析.

主要成果:

  • 发现珍珠电感,一种新的动力电感形式.
  • 在超薄膜中观察到状选超电流的扩展,从λL到14λL (厚度λL/7).
  • 实现了太赫兹超导,设备阻抗超过了33%的量子电阻极限 (RQ).

结论:

  • 珍珠电感显著增强了超导薄膜中的动感电感.
  • 这种效应使得在太赫兹频率范围内实现了前所未有的超导.
  • 这些发现为先进的电子,光子和量子技术铺平了道路.