Onar, K.Yakinci, M. E.2024-08-042024-08-0420161742-65881742-6596https://doi.org/10.1088/1742-6596/667/1/012006https://hdl.handle.net/11616/972189th International Conference on Magnetic and Superconducting Materials (MSM) -- APR 30-MAY 03, 2015 -- Antalya, TURKEYFeTe0.5Se0.5 polycrystalline superconductor samples were synthesized by solid-state reaction method at different heating temperatures. The morphological and structural characterization of FeTe0.5Se0.5 samples were carried out by X-rays Diffraction, Scanning Electron Microscope and Energy Dispersive X-ray Spectroscopy. The electrical, magnetic and thermal transport properties were investigated up to 8 T by using physical property measurement system. The results reveal that the sensitivity of electrical and magnetic properties strongly depends on the heat treatment cycles. The upper critical field, H-c2(0), was determined with the magnetic field parallel to the sample surface. It gives a maximum value of 36.3 T. The lower critical field, H-c1(T), was obtained as 210, 140 and 70 Oe at 5, 8 and 12 K, respectively. The coherence length, xi, at the zero field, was calculated to be 1.94 nm and suggested a transparent intergrain boundaries peculiarity. The mu H-0(c2)(0)/k(B)T(c) rate shows higher value (3.36 T/K) than the Pauli limit (1.84 T/K) which suggests unconventional nature of superconductivity for the polycrystalline FeTe0.5Se0.5 superconducting samples.eninfo:eu-repo/semantics/openAccess[No Keywords]Conference Object66710.1088/1742-6596/667/1/0120062-s2.0-84960192333N/AWOS:000368085300006N/A