Maheshwari, P. K. and Jha, Rajveer and Gahtori, Bhasker and Awana, V. P. S. (2016) Structural and Transport Studies of Under-Doped FeTe1-xSex(x=0.0, 0.01, 0.03, 0.05) Single Crystals. Journal of Superconductivity and Novel Magnetism , 29 (3). 543-545 . ISSN 1557-1939

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We report the synthesis of under-doped non-superconducting parent compound of iron chalcogenide, i.e, FeTe Se1-x (x) (x =0.0, 0.01, 0.03, 0.05) single crystals by flux-free method. These FeTe Se1-x (x) (x =0.0, 0.01, 0.03, 0.05) single crystals are crystallized in the tetragonal structure with space group P4/nmm at room temperature. Detailed scanning electron microscopy (SEM) results showed that the crystals are formed in slab-like morphology structure. Powder X-ray diffraction (XRD) results show that (0 0 l) peaks are shifted towards higher angel with increasing Se concentration. Coupled magnetic and structural phase transition temperature, being seen as a step in resistivity, decreases from around 67K for x =0.0 to 55K for x =0.05 crystal. Further, the step in resistivity is seen to be hysteric (Delta T) in nature, i.e., different step temperatures in cooling and warming cycles. Interestingly, the hysteric (Delta T) becomes narrower from around 5.8 K for x =0.0 to 0.95 K for x = 0.05 crystal.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Subjects: Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 20 Apr 2018 06:56
Last Modified: 20 Apr 2018 06:56

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