Fuerzas de atracción y repulsión en superconductores YBCO texturizados y sinterizados: un estudio comparativo

Autores/as

  • Diego Andrés Arias-Arana Universidad Nacional de Colombia
  • Juan Diego Rojas-Zambrano Universidad Nacional de Colombia
  • Álvaro Mariño-Camargo Universidad Nacional de Colombia https://orcid.org/0000-0002-7629-5891

DOI:

https://doi.org/10.17533/udea.redin.20191044

Palabras clave:

investigación aplicada, temperatura, medición

Resumen

En este artículo medimos las fuerzas de atracción (suspensión) y repulsión (levitación) producidas por la interacción entre un imán permanente y diferentes superconductores. Las medidas de la fuerza de interacción HTS-PM fueron realizadas en un dispositivo sencillo, confiable y de bajo costo. Los resultados obtenidos fueron analizados utilizando el Modelo de Estado-Crítico propuesto por Bean bajo la suposición de un campo magnético uniforme aplicado al superconductor. Se utilizaron dos muestras superconductoras de YBa2Cu3O7-δ preparadas por el método de reacción de estado sólido (S) y por el método de texturizado y fundido (MTG). Las muestras presentaron diferente comportamiento de histéresis en los regímenes de field cooling (FC) y  zero field cooling (ZFC). Los fenómenos de levitación y suspensión se observaron en la muestra MTG; sin embargo, la muestra sinterizada con deficiencias de oxígeno ( ) sólo mostró una ligera fuerza de levitación, aunque no de suspensión, esta última propiedad atribuida a un  anclaje del flujo magnético más eficiente. Se determinó la densidad de corriente crítica en ambas muestras a  partir del máximo gap de la fuerza ( ) en el régimen FC. Los valores obtenidos están entre 43.00 A/cm2 y 2,758 A/cm2 para la muestra sinterizada y MTG respectivamente. Las diferencias observadas entre las dos muestras coinciden con las determinadas a partir de medidas de magnetización, lo cual indica que estas medidas podrían utilizarse para una rápida caracterización de muestras superconductoras policristalinas.

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Biografía del autor/a

Diego Andrés Arias-Arana, Universidad Nacional de Colombia

Grupo de Superconductividad y Nuevos Materiales, Departamento de Física.

Juan Diego Rojas-Zambrano, Universidad Nacional de Colombia

Grupo de Superconductividad y Nuevos Materiales, Departamento de Física.

Álvaro Mariño-Camargo, Universidad Nacional de Colombia

Grupo de Superconductividad y Nuevos Materiales, Departamento de Física.

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Publicado

2020-02-21

Cómo citar

Arias-Arana, D. A., Rojas-Zambrano, J. D., & Mariño-Camargo, Álvaro. (2020). Fuerzas de atracción y repulsión en superconductores YBCO texturizados y sinterizados: un estudio comparativo. Revista Facultad De Ingeniería Universidad De Antioquia, (96), 44–50. https://doi.org/10.17533/udea.redin.20191044