Mechanism of enhancement of superconducting properties in a Ba 1-xK xFe 2As 2 superconductor by Pb addition Article

Zhang, X, Yao, C, Wang, C et al. (2012). Mechanism of enhancement of superconducting properties in a Ba 1-xK xFe 2As 2 superconductor by Pb addition . 25(8), 10.1088/0953-2048/25/8/084024



cited authors

  • Zhang, X; Yao, C; Wang, C; Gao, Z; Wang, D; Wang, C; Lin, H; Qi, Y; Wang, L; Ma, Y

fiu authors

abstract

  • A comparative study of the addition of Pb to polycrystalline Ba 0.6K 0.4Fe 2As 2 has revealed that the Pb should be added after the Ba 0.6K 0.4Fe 2As 2 phase has formed. The uniformly dispersed Pb can ameliorate the Ba 0.6K 0.4Fe 2As 2 grain linkages. In contrast, pre-added Pb in the raw powder congregatesto form large particles and has hardly any positive effect on the J c enhancement. To conglutinate at the grain surface and avoid contamination of the Ba 0.6K 0.4Fe 2As 2, the material added should have a low melting point and inertia to the superconducting phase. This model also enables us to predict desirable dopants for enhancing superconducting properties of Ba 0.6K 0.4Fe 2As 2. © 2012 IOP Publishing Ltd.

publication date

  • August 1, 2012

Digital Object Identifier (DOI)

volume

  • 25

issue

  • 8