Improvement of structural and superconducting properties of Bi-2212 textured rods by substituting sodium
In this paper, the physical and superconducting properties of BiSrCaNaCuO with x=0.0, 0.05, 0.075, 0.1, and 0.20 textured superconducting fiber rods prepared by a laser floating zone (LFZ) technique were studied. The effects of Na substitution for Ca have been investigated by X-ray diffraction (XRD)...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión enviada para evaluación y publicación |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/148410 |
| Acceso en línea: | http://hdl.handle.net/10261/148410 |
| Access Level: | acceso abierto |
| Palabra clave: | Bi-2212 Critical current density Laser floating zone technique Sodium substitution Superconductivity |
| Sumario: | In this paper, the physical and superconducting properties of BiSrCaNaCuO with x=0.0, 0.05, 0.075, 0.1, and 0.20 textured superconducting fiber rods prepared by a laser floating zone (LFZ) technique were studied. The effects of Na substitution for Ca have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transport measurements, dc-magnetization, magnetic hysteresis and magnetic critical current density. The powder XRD patterns of samples have indicated that Bi-2212 phase is the major one, independently of Na content. The best critical temperature, T, has been found as 93.3 K from M-T data for the sample with 0.075 Na substitution. The maximum magnetic J value has been calculated as 1.35×10 A/cm at 10 K for the 0.10 Na sample. The maximum transport critical current density has directly been measured as 1.3×10 A/cm at 77 K for the 0.05Na sample. |
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