Synthesis of material FeSe with a solid state reaction method for superconductor applications

Since the discovery of superconductor La[O_1-xF_x]FeAs with T_c=26K in 2008, the research on Fe-based superconductors become an intesive research. The iron that belief as the antagonistic againts superconductivity was breaking with this discovery. Iron was a material which have characteristic as conductor. In this research, FeSe with the ratio Fe:Se 1:1 was prepared by solid state reaction method by using high energy milling and sintered in quartz tube. The samples with high purity powders of iron (99.99%) and selenium (99.99%) initially prepared in glove box and sealed in to the high energy milling jar and well mixed in the shaker mill for 2 hours. Then, the sample were placed into quartz tube and heat up to 500°C for 6 hours. After the heat treatment of the sample, structural properties of the material were characterized by X-ray Diffractometer (XRD) and for the morphology of the material were characterized by Scanning Electron Microscope (SEM-EDX). The resistance of the sample were analyzed with Oxford Instrument Teslatron^TMCF Cryogenic with four point probe method. The result of XRD analyze show that the sample has FeSe phase with space group P4/nmm and the morphology of the sample were similar with the literature. The resistivity of the sample shown that the sample have the characteristic of superconductor with Tconset10 K altough the curve in cryogenic result not showing the final T_c of the sample but the whole curve can be compared with the literature.