| Fabrication and characterization of SmO_（0.7）F_（0.2）FeAs bulk with a transition temperature of 56.5 K |
| |
| 引用本文： | LIU Zhiyong,MA Lin,ZHAO Junjing,YAN Binjie,SUO Hongli. Fabrication and characterization of SmO_（0.7）F_（0.2）FeAs bulk with a transition temperature of 56.5 K[J]. 稀有金属(英文版), 2011, 30(5): 496-500. DOI: 10.1007/s12598-011-0418-y |
| |
| 作者姓名： | LIU Zhiyong MA Lin ZHAO Junjing YAN Binjie SUO Hongli |
| |
| 作者单位： | [1]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China [2]Department of Physics, University oflUinois at Chicago, Chicago, IL 60607, America [3]Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, America |
| |
| 基金项目： | supported by the National Basic Research Program of China (No. 2006CB601005); the National High Technology Research and Development Program of China (No. 2009AA032401); the National Natural Science Foundation of China (Nos. 50771003 and 50802004); the Beijing Municipal Natural Science Foundation (No. 2092006); the Program for New Century Excellent Talents in University of Ministry of Education of China (No. 39009001201002) |
| |
| 摘 要： | The superconductivity of iron-based superconductor SmO 0.7 F 0.2 FeAs was investigated. The SmO 0.7 F 0.2 FeAs sample was prepared by the two-step solid-state reaction method. The onset resistivity transition temperature is as high as 56.5 K. X-ray diffraction (XRD) results show that the lattice parameters a and c are 0.39261 and 0.84751 nm, respectively. Furthermore, the global J c was more than 2.3 × 10 5 A/cm 2 at T = 10 K and H = 9 T, which was calculated by the formula of J c = 20ΔM/[a(1-a/(3b))]. The upper critical fields, H c2 ≈ 256 T (T = 0 K), was determined according to the Werthamer-Helfand-Hohenberg formula, indicating that the SmO 0.7 F 0.2 FeAs was a superconductor with a very promising application.
|
| 关 键 词： | iron-based superconductor superconductivity solid-state reaction transition temperature |
Fabrication and characterization of SmO0.7F0.2FeAs bulk with a transition temperature of 56.5 K |
| |
| Zhiyong Liu,Lin Ma,Junjing Zhao,Binjie Yan,Hongli Suo. Fabrication and characterization of SmO0.7F0.2FeAs bulk with a transition temperature of 56.5 K[J]. Rare Metals, 2011, 30(5): 496-500. DOI: 10.1007/s12598-011-0418-y |
| |
| Authors: | Zhiyong Liu Lin Ma Junjing Zhao Binjie Yan Hongli Suo |
| |
| Affiliation: | LIU Zhiyong a,MA Lin a,ZHAO Junjing b,c,YAN Binjie a,and SUO Hongli a a College of Materials Science and Engineering,Beijing University of Technology,Beijing 100022,China b Department of Physics,University of Illinois at Chicago,Chicago,IL 60607,America c Materials Science Division,Argonne National Laboratory,Argonne,IL 60439,America |
| |
| Abstract: | The superconductivity of iron-based superconductor SmO0.7F0.2FeAs was investigated. The SmO0.7F0.2FeAs sample was prepared by the two-step solid-state reaction method. The onset resistivity transition temperature is as high as 56.5 K. X-ray diffraction (XRD) results show that the lattice parameters a and c are 0.39261 and 0.84751 nm, respectively. Furthermore, the global J c was more than 2.3 × 105 A/cm2 at T = 10 K and H = 9 T, which was calculated by the formula of J c = 20ΔM/[a(1 − a/(3b))]. The upper critical fields, H c2 ≈ 256 T (T = 0 K), was determined according to the Werthamer-Helfand-Hohenberg formula, indicating that the SmO0.7F0.2FeAs was a superconductor with a very promising application. |
| |
| Keywords: | iron-based superconductor superconductivity solid-state reaction transition temperature |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
|
