Microstructure and superconductivity of Ir-doped BaFe2As2 superconductor

Details Microstructure and superconductivity of Ir-doped BaFe2As2 superconductor Microstructure and superconductivity of Ir-doped BaFe2As2 superconductor

2009-12-21

arxiv.org/abs/0912.4113v1

Applied Physics Letters 96, 012507(2010)

Physics

Condensed Matter

Superconductivity

9 pages, 4 figures. Accepted for publication in Applied Physics Letters

Scientific paper

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.

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