Kumar, Anuj and Tandon, R. P. and Awana, V. P. S. (2012) Effect of 3d Metal (Co and Ni) Doping on the Superconductivity of FeSe0.5Te0.5. IEEE Transactions on Magnetics, 48 (11). pp. 4239-4242. ISSN 0018-9464

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We report the effect of 3d metal Cobalt (Co) and Nickel (Ni) doping on the FeTe0.5Se0.5 superconductor with the nominal composition range Fe1-xMxTe0.5Se0.5 (M = Co, Ni and x = 0.00, 0.010.02, 0.05, and 0.10). Samples are synthesized through standard solid state reaction route and all are crystallize in single phase tetragonal structure with space group P4/nmm. The lattice parameters 'a', 'c' and volume decrease with increase in Co and Ni content, although not monotonically. In fact the 'a' lattice parameter is nearly unaffected for Co doped samples. The superconducting transition temperature (T-c) is measured from both DC and AC magnetic susceptibility, which decrease with increase in Ni or Co content. Both Co and Ni suppress T-c and drive the system into the normal state. Interestingly, Ni suppresses the superconductivity much faster than the Co. This indicates less effect on in-plane Fe-Se distances and thus reduced disorder in case of Co when compared with Ni substation at Fe site in FeTe0.5Se0.5 superconductor. It is concluded that in-plane disorder on superconducting Fe-Se and Fe-Se-Se planes directly affects superconductivity in FeTe0.5Se0.5 superconductor.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Institute of Electrical and Electronics Engineers.
Subjects: Engineering > Electronics and Electrical Engineering
Applied Physics/Condensed Matter
Depositing User: Users 27 not found.
Date Deposited: 14 Feb 2020 07:35
Last Modified: 14 Feb 2020 07:35
URI: http://npl.csircentral.net/id/eprint/3639

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