中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 10 No. 2 April 2000 |
superconducting properties with F-doped in YBaCuO series①
（1. Department of Applied Physics, Hunan University, Changsha 410082, P.R.China;
2. Department of Chemistry, Central South University of Technology, Changsha 410083, P.R.China;
3. Department ofPhysics, Hunan Normal University, Changsha 410081, P.R.China）
Abstract:A series of YBa2Cu3O6.5-0.5x+δFx(x=0, 0.3, 0.6, 1.0, 1.5, 2.0) samples were synthesized using state reaction method. The superconducting properties and microstructures of the samples were studied with AC susceptibility, DC resistivity, fluorine and oxygen content measurements, XRD, IR and XPS techniques. The results show that F-doping increases theTCand decreases the transition width, and fluorine atoms have entered into the superconducting phase and substituted for the oxygen atoms at O(4) sites. The mechanism of improving superconducting properties is that fluorine-doping adjusts the hole carrier concentration in the Cu-O planes.
附件:2000-2-9
Key words: superconductor; YBaCuO; F-doped
