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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

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...
Superconductor01:24

Superconductor

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...
Types Of Superconductors01:28

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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...
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

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Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
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Diamagnetism01:26

Diamagnetism

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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Torque On A Current Loop In A Magnetic Field01:13

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The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
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Scanning SQUID Study of Vortex Manipulation by Local Contact
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Published on: February 1, 2017

Triplet superconductivity in a ferromagnetic vortex.

Mikhail S Kalenkov1, Andrei D Zaikin, Victor T Petrashov

  • 1I.E. Tamm Department of Theoretical Physics, P.N. Lebedev Physical Institute, 119991 Moscow, Russia.

Physical Review Letters
|September 21, 2011
PubMed
Summary
This summary is machine-generated.

Triplet superconductivity is achievable in hybrid superconductor-ferromagnet structures. These structures can sustain measurable supercurrents, enabling direct experimental observation of triplet pairing.

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Area of Science:

  • Condensed Matter Physics
  • Superconductivity
  • Spintronics

Background:

  • Triplet superconductivity offers unique quantum phenomena.
  • Hybrid superconductor-ferromagnet (S-F) structures are promising for novel electronic devices.
  • Controlling superconductivity in magnetic systems is a key challenge.

Purpose of the Study:

  • To demonstrate the convenient realization of triplet superconductivity in S-F structures.
  • To investigate the potential for measurable supercurrents in S-F-S junctions.
  • To explore the tunability of junction regimes (zero- or π-junctions).

Main Methods:

  • Theoretical modeling of hybrid superconductor-ferromagnet structures.
  • Analysis of proximity-induced long-range triplet pairing.
  • Investigation of supercurrents in S-F-S Josephson junctions.

Main Results:

  • Ferromagnetic vortices in S-F structures facilitate triplet superconductivity.
  • S-F-S junctions sustain significant supercurrents due to triplet pairing.
  • The system can be tuned to exhibit either zero- or π-junction behavior based on geometry.

Conclusions:

  • Hybrid S-F structures with ferromagnetic vortices provide a viable platform for triplet superconductivity.
  • The predicted supercurrents are experimentally measurable, opening avenues for device applications.
  • Tunable junction properties offer control over quantum phenomena in these hybrid systems.