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Mecanismo de la textura impulsada por la solución sólida inducida por el dopaje de la edad en el superconductor YBCO.

Fenyan Zhao1,2, Baoqiang Zhang1,2, Xiyang Su3

  • 1Key Laboratory of Mechanics on Disaster and Environment in Western China attached to the Ministry of Education of China, Lanzhou University, Lanzhou, Gansu, P. R. China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 10, 2026
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Resumen

El dopaje de plata en los superconductores de óxido de cobre yttrio bario (YBCO) crea una solución sólida, mejorando la densidad crítica de corriente y promoviendo la fractura transgranular. Esto revela un mecanismo para la evolución de la textura mediada por dopantes en materiales de tierras raras de óxido de cobre y bario (REBCO).

Palabras clave:
El Ag-doping es el doping de la agricultura.HTS HTS es el nombre que se le da a las HTS.YBCO YBCO es el nombreinterfaz de interfaz coherente y coherente.textura impulsada por la solución sólida.

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Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • La superconductividad es la superconductividad.
  • Química del estado sólido.

Sus antecedentes:

  • La mejora de las propiedades superconductoras y mecánicas del óxido de cobre de yttrio bario (YBCO) es crucial.
  • El mecanismo del dopaje de plata (Ag) en YBCO, específicamente la segregación de Ag frente a la incorporación de celosía, sigue siendo objeto de debate.
  • Los métodos convencionales de dopaje limitan la comprensión de los efectos del Ag debido a la formación de gradientes obstaculizados.

Objetivo del estudio:

  • Para investigar el mecanismo de Ag doping en YBCO utilizando una nueva estrategia de fabricación.
  • Para aclarar el papel de la sustitución de Ag en la formación de la textura y la mejora de las propiedades.
  • Proporcionar información sobre la evolución de la textura mediada por dopantes en los superconductores REBCO.

Principales métodos:

  • Coextrusión de doble material y liofilización para crear una interfaz Ag-YBCO macroscópica.
  • Procesamiento a alta temperatura para permitir la difusión de Ag y la formación de gradientes de composición.
  • Cálculos de primeros principios para comprender los efectos de la sustitución de Ag en la relajación y textura de la celosía.

Principales resultados:

  • Formación de una solución sólida YBa2Cu3-xAgxO7-δ orientada a [001] con interfaces coherentes.
  • Transmisión de la orientación cristalográfica a escala atómica, promoviendo el crecimiento orientado de YBCO.
  • Mejora significativa en la densidad crítica de corriente (Jc) y un cambio a la fractura transgranular, mientras que la temperatura crítica (Tc) se mantuvo estable.

Conclusiones:

  • El dopaje de plata en YBCO conduce a la formación de una solución sólida y a la evolución de la textura.
  • La relajación de la celosía inducida por la sustitución de Ag impulsa la formación de textura y la mejora de las propiedades.
  • El estudio revela un mecanismo para la textura mediada por dopante en los superconductores REBCO.