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Related Concept Videos

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...
1.1K
Types Of Superconductors01:28

Types Of Superconductors

932
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...
932
Ferromagnetism01:31

Ferromagnetism

2.4K
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...
2.4K
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
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

865
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
865
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

935
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
935

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Related Experiment Video

Updated: Jun 3, 2025

Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride
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Comparison of Two Different Synthesis Methods of Single Crystals of Superconducting Uranium Ditelluride

Published on: July 8, 2021

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Superconducting critical temperature elevated by intense magnetic fields.

Z Wu1, H Chen1, T I Weinberger1

  • 1Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, United Kingdom.

Proceedings of the National Academy of Sciences of the United States of America
|January 8, 2025
PubMed
Summary
This summary is machine-generated.

Superconductors normally lose their properties in magnetic fields. However, UTe2 exhibits enhanced superconductivity under high magnetic fields, suggesting a new mechanism for this phenomenon.

Keywords:
heavy fermionhigh magnetic fieldtriplet superconductor

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Materials

Background:

  • Superconductors exhibit zero electrical resistance below a critical temperature.
  • Applied magnetic fields typically suppress superconductivity, eventually reaching zero at a critical field strength.
  • Understanding the interplay between magnetic fields and superconductivity is crucial for technological applications.

Purpose of the Study:

  • To investigate the behavior of superconductivity in UTe2 under high pulsed magnetic fields.
  • To explore the phenomenon of magnetic field-induced superconductivity in this material.
  • To compare superconductivity mechanisms at zero and high magnetic fields.

Main Methods:

  • High-quality specimens of UTe2 were used for the investigation.
  • Pulsed magnetic fields up to 70 Tesla were applied.
  • Superconducting critical temperature (Tc) was measured as a function of magnetic field strength.

Main Results:

  • UTe2 exhibits superconductivity at temperatures up to 2.4 K in magnetic fields of 40 T.
  • This critical temperature is higher than the Tc of 2.1 K observed at zero magnetic field (0 T).
  • The material shows enhanced superconductivity under a strong magnetic field.

Conclusions:

  • The observed magnetic field-induced superconductivity in UTe2 suggests a distinct formation mechanism compared to conventional superconductors.
  • This finding challenges existing theories and opens new avenues for understanding unconventional superconductivity.
  • UTe2 represents a promising candidate for exploring novel superconducting states.