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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...
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Superconductor01:24

Superconductor

1.1K
A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
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Paramagnetism01:30

Paramagnetism

2.5K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.5K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

258
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
258
Diamagnetism01:26

Diamagnetism

2.4K
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.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
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Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
4.7K

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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非线性超导磁电效应 非线性超导磁电效应

Jin-Xin Hu1, Oles Matsyshyn1, Justin C W Song1

  • 1Nanyang Technological University, Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Singapore 637371.

Physical review letters
|February 6, 2025
PubMed
概括
此摘要是机器生成的。

我们在磁体-超导体异构结构中发现了一个非线性超导磁电 (NSM) 效应. 这种效应产生了自旋两极化,作为对超电流的二次反应,为控制磁化提供了一种新方法.

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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 这就是Spintronics.

背景情况:

  • 非中心对称超导体中的超流流可以通过非排放性磁电效应诱导自旋磁化.
  • 这种效应通常是对超电流的线性反应.

研究的目的:

  • 提出和研究磁-超导体异构结构中的非线性超导磁电 (NSM) 效应.
  • 探索NSM在超导自旋电子学中控制磁化的潜力.

主要方法:

  • 磁-超导体异构结构的理论研究.
  • 分析旋转极化作为对超级电流的二次反应.
  • 检查各种磁性材料中的NSM,包括对线和非对线磁体.

主要成果:

  • 提出了一个非线性超导磁电 (NSM) 效应,并发现它在磁体-超导体异构结构中表现出来.
  • 作为对驱动超级电流的二级反应,NSM产生了自旋两极化.
  • 即使在中心对称材料中,NSM效应仍然存在,并且在d波变磁超导体和kagome超导体等系统中是主要的磁反应.

结论:

  • 该NSM效应提供了一个强大的,电,和 nondissipative 控制磁化的方法.
  • 磁超导体异构结构是通过NSM效应实现超导自旋电子应用的有希望的平台.