Conveners
M4OrB - Superconductors IV: Pnictide Materials
- Hiroaki Kumakura (NIMS)
- Chiara Tarantini (NHMFL / FSU / ASC)
The iron-based superconductors of K-doped (Ba,K)Fe2As2(Ba-122) are potentially useful for high field applications due to their high upper critical fields of over 50T and small anisotropy. However, improvement of Jc is still required to PIT processed Ba-122 tapes for such applications. Two important factors that much influence Jc of PIT Ba-122 tapes are the density and c-axis grain orientation...
Iron pnictide superconductors are very attractive in the application of high magnetic field region, because of their large upper critical field, small anisotropic, etc. However, the practical realization requires pnictide wires having high transport current property, large mechanical property, multi-filamentary, homogeneity in long length, low cost. A lot of works had been carried out to solve...
The transport performance of 122 superconducting wires depends on impurity level, phase purity, the porosity, as well as the presence of micro-cracks. Here we investigate the formation and properties of BaK-122 precursors prepared using a high-energy ball milling (SPEX Milling) method. In this work we used tungsten-carbide ball-milling media, rather than stainless steel, as contamination from...
Iron-based superconductors (IBSs) have very promising characteristics for high-field applications [1]. Among various IBSs, 122-type compounds are most extensively studied due to their reasonably high $T_c$, $H_{c2}$, and $J_c$. In particular, (Ba,K)Fe$_2$As$_2$ single crystal has a large Jc, and it can be enhanced over 1x10$^7$ A/cm$^2$ (4.2 K, self-field) after irradiation [2,3]. Several...
After the discovery of Fe-based superconductors (FBS), a lot of efforts have been made in the fabrication of high-quality epitaxial FBS thin films. As a result, thin films of three different FBS on technical substrates have been realized, which shows the possibility of FBS coated conductor applications. Recently, the successful deposition of a P-doped BaFe$_2$As$_2$ (Ba-122) film on ion beam...
High-quality thin films are the fundamental basis for the realization of weak electronics and power applications in iron-based superconductors (IBSs), and the coated conductor is an important topic for superconducting applications. In this study, we investigated the transport properties of FeSe0.5Te0.5 (FST) thin films fabricated on poorly-aligned metal tape substrates (7.72°) with LaMnO3(LMO)...
