Zargar, Rayees A. and Hafiz, A. K. and Awana, V. P. S. (2015) Synthesis and Characterization of FeSe1-xTex (x=0, 0.5, 1) Superconductors. In: ADVANCED MATERIALS AND RADIATION PHYSICS (AMRP-2015). AIP Conference Proceedings , 1675 . AIP Publishing, 020044-1-020044-5.

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In this study, FeTe1-xSex (x=0,0.5,1) samples were prepared by conventional solid state reaction method and investigated by powder XRD, SEM, Raman and resistivity measurement techniques to reveal the effect of tellurium (Te) substitution in FeSe matrix. Rietveld analysis was performed on room temperature recorded, X-ray diffraction (XRD) patterns of pure FeSe, FeTe and FeSe0.5Te0.5 which shows that all the compounds are crystallized in a tetragonal structure. SEM images show the dense surface morphology. Raman spectra recorded in the range from 100 to 700 cm(-1) at ambient temperature has been interpreted by P4/nmm space group of the lattice. The variation in intensity and shift in peak positions of some phonon modes has been discussed on the basis of variation in crystalline field effect by substituting Te in FeSe lattice. The resistivity versus temperature curves reveals that FeSe becomes superconductor at 7 K and FeSe0.5Te0.5 shows superconductivity below14 K while FeTe is non-superconducting compound.

Item Type: Book Section
Additional Information: 4th National Conference on Advanced Materials and Radiation Physics (AMRP) Location: S L I E T, Dept Phys, Longowal, INDIA Date: MAR 13-14, 2015
Subjects: Applied Physics/Condensed Matter
Physics > Particle and Nuclear Physics
Depositing User: Dr. Rajpal Walke
Date Deposited: 02 Dec 2016 07:31
Last Modified: 02 Dec 2016 07:31

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