Enhancement of the upper critical field (HC2) in Nb2Pd(S0.9Te0.1)5 superconducting fibers

Here, we report the synthesis and characterization of the Nb2Pd(S0.9Te0.1)5 superconductor. The resultant polycrystalline sample is consists of solid chunks along with mesh of fibers which are grown in thin long rod shapes having length in several millimeters with cross-sectional area around 5x3 µm2. The normal state of this superconductor behaves abnormally compared to its parent compound (Nb2PdS5) which is shown here. In high temperature regime (T > 125K) it follows the power law which is completely different from its parent analog which shows metallicity (linear behavior) in high temperature range. Below this temperature region a broad peak appears centered around T* ≈ 62K, the origin of this anomaly is unknown right now, followed by a dip which is centered around T’ ≈ 23K which may be some sort of electron localization or some gap like excitation which preceding the superconducting transition having onset at Tc (onset)≈ 6.7K. The upper critical field value Hc2(0) = 52.24T enhances in these superconducting fibers. Aslamazov-Larkin (AL) theory shows three significant (3D, 1D and short-wave (SW)) fluctuation regimes in these superconducting fibers.