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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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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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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
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Video Experimental Relacionado

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Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
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Published on: December 5, 2015

Cables superconductores de alto rendimiento de alto TC de alto rendimiento.

S Kang1, A Goyal, J Li

  • 1Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.

Science (New York, N.Y.)
|April 1, 2006
PubMed
Resumen
Este resumen es generado por máquina.

Desarrollamos cables superconductores de alto rendimiento utilizando películas gruesas YBa2Cu3O(7-delta) con defectos columnares. Estos cables demuestran una excelente densidad de corriente crítica, incluso en campos magnéticos fuertes, cumpliendo con los requisitos para aplicaciones a gran escala.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Física de la materia condensada Física de la materia condensada
  • La superconductividad es la superconductividad.

Sus antecedentes:

  • Los materiales superconductores de alta temperatura (HTS) ofrecen un potencial significativo para aplicaciones a gran escala.
  • Lograr una alta densidad crítica de corriente (Jc) en campos magnéticos aplicados sigue siendo un desafío clave para los cables HTS.

Objetivo del estudio:

  • Desarrollar y caracterizar segmentos de alambre superconductor que cumplan con los requisitos de rendimiento para aplicaciones exigentes.
  • Para mejorar el rendimiento crítico de la corriente y el campo magnético de las películas YBa2Cu3O{7-delta).

Principales métodos:

  • Crecimiento epitaxial de películas de YBa2Cu3O(7-delta) de 3 micrómetros de espesor en sustratos texturizados biaxialmente asistidos por laminado utilizando ablación láser pulsada.
  • Incorporación de matrices periódicas de defectos columnares (nanodots autoalineados) a lo largo del grosor de la película.

Principales resultados:

  • Las películas fabricadas de YBa2Cu3O ((7-delta) demostraron densidades críticas de corriente que cumplen o exceden los requisitos de la aplicación.
  • Se observaron mejoras significativas en la corriente crítica en el autocampo, con una excelente retención de corriente en campos magnéticos de alta aplicación.
  • Los defectos columnares efectivamente fijaron vórtices superconductores, lo que condujo a una mejora sustancial en el rendimiento del alambre.

Conclusiones:

  • Los segmentos de alambre superconductor desarrollados muestran una gran promesa para aplicaciones a gran escala que requieren un alto rendimiento en campos magnéticos.
  • La estrategia de incorporar defectos columnares es efectiva para mejorar la densidad crítica de corriente y la resistencia al campo magnético de los cables HTS.