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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

3.2K
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...
3.2K
Diamagnetism01:26

Diamagnetism

3.1K
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....
3.1K
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

1.5K
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
1.5K
Superconductor01:24

Superconductor

1.9K
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...
1.9K
Paramagnetism01:30

Paramagnetism

3.1K
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...
3.1K
Types Of Superconductors01:28

Types Of Superconductors

1.7K
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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Iron Nanowire Fabrication by Nano-Porous Anodized Aluminum and its Characterization
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Superconducting Ferromagnetic Nanodiamond.

Gufei Zhang, Tomas Samuely1, Zheng Xu2

  • 1Centre of Low Temperature Physics, Institute of Experimental Physics, Slovak Academy of Sciences and Faculty of Science, P. J. Safarik University , 04001 Kosice, Slovakia.

ACS Nano
|May 17, 2017
PubMed
Summary
This summary is machine-generated.

Researchers observed electronic entanglement between superconducting and ferromagnetic states in nanodiamond films. This finding reveals a precursor phase with spin fluctuations, suggesting applications in spintronics and magnetoelectronics.

Keywords:
anomalous Hall effectgiant positive magnetoresistancenanodiamondspin fluctuationssuperconductivity and ferromagnetism

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Quantum phenomena

Background:

  • Superconductivity and ferromagnetism are typically antagonistic states.
  • Understanding their interplay is crucial for quantum phenomena and superconductivity mechanisms.

Purpose of the Study:

  • To investigate the electronic entanglement between superconducting and ferromagnetic states.
  • To explore the properties of hydrogenated boron-doped nanodiamond films.

Main Methods:

  • Fabrication of hydrogenated boron-doped nanodiamond films.
  • Measurement of superconducting transition temperature (Tc) and Curie temperature (TCurie).
  • Analysis of temperature-dependent magnetization and resistivity.

Main Results:

  • Observation of electronic entanglement between superconducting (~3 K) and ferromagnetic (>400 K) states.
  • Anomalous magnetic and electrical transport properties indicating a precursor phase with spin fluctuations.
  • Evidence of high-temperature ferromagnetism, giant magnetoresistance, and anomalous Hall effect.

Conclusions:

  • The nanodiamond films exhibit a unique interplay between superconductivity and ferromagnetism.
  • The observed precursor phase and properties suggest potential applications in magnetoelectronics, spintronics, and magnetic field sensing.