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Coexistencia de superconductividad y ferromagnetismo en URhGe
D Aoki1, A Huxley, E Ressouche
1CEA, Département de Recherche Fondamentale sur la Matière Condensée, SPSMS, 38054 Grenoble Cedex 9, France.
Nature
|October 12, 2001
Resumen
La superconductividad y el ferromagnetismo coexisten en URhGe a presión ambiente. Este hallazgo sugiere que la combinación de estas dos propiedades puede ser más común en los materiales de lo que se pensaba anteriormente.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada
- Ciencia de los materiales Ciencia de los materiales.
- Materiales Cuánticos Los materiales cuánticos son los materiales cuánticos.
Sus antecedentes:
- La superconductividad en materiales ferromagnéticos es rara y poco conocida.
- Las observaciones anteriores en UGe2 y ZrZn2 sugirieron el potencial de superconductividad en ferromagnetos, pero carecían de una prueba definitiva o una simetría de emparejamiento clara.
Objetivo del estudio:
- Investigar el potencial de superconductividad en el material ferromagnético URhGe a presión ambiente.
- Para identificar la firma termodinámica y la simetría de emparejamiento de la superconductividad en URhGe.
Principales métodos:
- Investigación experimental de URhGe a presión ambiente.
- Medición de las firmas termodinámicas para confirmar la superconductividad.
- Análisis de las características de la transición para inferir simetría de emparejamiento.
Principales resultados:
- URhGe exhibe superconductividad a presión ambiente.
- Se detectó una clara firma termodinámica de la transición superconductora.
- Las características de la transición son consistentes con el emparejamiento superconductor spin-triplet.
Conclusiones:
- El ferromagnetismo y la superconductividad pueden coexistir en materiales como el URhGe a presión ambiente.
- Los hallazgos apoyan la posibilidad de superconductividad de espín triple en ferromagnetos.
- Este descubrimiento amplía la comprensión de la coexistencia de superconductividad y ferromagnetismo, lo que sugiere que puede ser más frecuente de lo que se pensaba anteriormente.
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