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Oxypnictide SmFeAs(O,F) superconductor: a candidate for high–field magnet applications

The recently discovered oxypnictide superconductor SmFeAs(O,F) is the most attractive material among the Fe-based superconductors due to its highest transition temperature of 56 K and potential for high-field performance. In order to exploit this new material for superconducting applications, the kn...

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Detalles Bibliográficos
Autores principales: Iida, Kazumasa, Hänisch, Jens, Tarantini, Chiara, Kurth, Fritz, Jaroszynski, Jan, Ueda, Shinya, Naito, Michio, Ichinose, Ataru, Tsukada, Ichiro, Reich, Elke, Grinenko, Vadim, Schultz, Ludwig, Holzapfel, Bernhard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3705587/
https://www.ncbi.nlm.nih.gov/pubmed/23823976
http://dx.doi.org/10.1038/srep02139
Descripción
Sumario:The recently discovered oxypnictide superconductor SmFeAs(O,F) is the most attractive material among the Fe-based superconductors due to its highest transition temperature of 56 K and potential for high-field performance. In order to exploit this new material for superconducting applications, the knowledge and understanding of its electro-magnetic properties are needed. Recent success in fabricating epitaxial SmFeAs(O,F) thin films opens a great opportunity to explore their transport properties. Here we report on a high critical current density of over 10(5) A/cm(2) at 45 T and 4.2 K for both main field orientations, feature favourable for high-field magnet applications. Additionally, by investigating the pinning properties, we observed a dimensional crossover between the superconducting coherence length and the FeAs interlayer distance at 30–40 K, indicative of a possible intrinsic Josephson junction in SmFeAs(O,F) at low temperatures that can be employed in electronics applications such as a terahertz radiation source and a superconducting Qubit.