Polycrystalline samples with nominal composition of Ba(Fe1-xIrx)2As2 (x=0.10, 0.15, and 0.20) were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), electrical resistivity, and magnetization measurements. XRD and SEM results showed that almost single phase samples were obtained. Bulk superconductivity with TC~28 K was observed in the x=0.10 sample. TC~28 K is the highest superconducting critical temperature among the reported data for electron-doped AFe2As2-type (A=Ca, Sr, and Ba) superconductors. The upper critical field Hc2(0) reaches as high as 65 T for the x=0.10 sample. The underlying physics is discussed in connection with Co-doping case.
@article{arxiv.0912.4113,
title = {Microstructure and superconductivity of Ir-doped BaFe2As2 superconductor},
author = {X. L. Wang and H. Y. Shi and X. W. Yan and Y. C. Yuan and Z. -Y. Lu and X. Q. Wang and T. -S. Zhao*},
journal= {arXiv preprint arXiv:0912.4113},
year = {2015}
}
Comments
9 pages, 4 figures. Accepted for publication in Applied Physics Letters