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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

2.8K
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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Types Of Superconductors01:28

Types Of Superconductors

1.4K
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 Moving Charges01:23

Magnetic Field due to Moving Charges

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
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Superconductor01:24

Superconductor

1.5K
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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Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

3.8K
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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Magnetic Force Between Two Parallel Currents01:13

Magnetic Force Between Two Parallel Currents

4.2K
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.
The force exerted by the magnetic field due to the first conductor over a finite length of the second conductor is given as the product of the current in the second conductor and  the vector product of the length vector along the current element and the field due to the first conductor. According to the...
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Updated: Nov 21, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
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Supercurrent Induced by Chiral Coupling in Multiferroic/Superconductor Nanostructures.

Bjoern Niedzielski1, Chenglong Jia2, Jamal Berakdar1

  • 1Institut für Physik, Martin-Luther Universität Halle-Wittenberg, 06099 Halle (Saale), Germany.

Nanomaterials (Basel, Switzerland)
|January 16, 2021
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This study explores controlling superconductor vortices using a magnetic top layer. Researchers demonstrate how spin helicity can manipulate vortex behavior in superconducting materials.

Keywords:
multiferroic/superconductor nanostructuressuperconducting vorticessuperconductor

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Spintronics

Background:

  • Investigating type II superconductors (SC) with novel heterostructures.
  • Understanding proximity effects between magnetic and superconducting layers.
  • Exploring spin-current-driven ferroelectric polarization.

Purpose of the Study:

  • To study the transport and superconducting dynamics in a type II SC with a normal, magnetically ordered top layer.
  • To investigate how proximity effects influence supercurrent transport and vortex dynamics.
  • To demonstrate the control of vortices using the spin helicity of the top layer.

Main Methods:

  • Utilizing the time-dependent Ginzburg-Landau approach.
  • Modeling heterostructures with type II superconductors and magnetically ordered layers.
  • Analyzing anisotropic supercurrent transport and vortex behavior.

Main Results:

  • Proximity effects lead to anisotropic supercurrent transport.
  • Vortex dynamics in the SC are modified by the magnetic top layer.
  • Spin helicity in the top layer enables control over vortex pinning and guiding.

Conclusions:

  • The spin helicity of the top layer can be leveraged to manipulate superconducting vortices.
  • Electric gating and other coupling methods can control vortex behavior.
  • This research offers pathways for novel superconducting device applications.