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Improvement of superconducting properties in Fe1+xSe0.5Te0.5 superconductor by Cr-substitution

Yadav, Anil K and Sanchela, Anup V and Tomy, CV (2015) Improvement of superconducting properties in Fe1+xSe0.5Te0.5 superconductor by Cr-substitution. In: SOLID STATE COMMUNICATIONS, 206 . pp. 26-30.

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Official URL: http://dx.doi.org/10.1016/j.ssc.2015.01.009

Abstract

Enhancement of superconducting transition temperature (T-c) of parent superconductor, Fe1+xSe, of `Fe-11' family by Cr-substitution for excess Fe has been motivated us to investigate the effect of Cr-substitution in optimal superconductor or Fe1+xSe0.5Te0.5 at Fe site. Here, we report structural, magnetic, electrical transport, thermal transport and heat capacity properties or Cr-substitute compounds. x-ray diffraction measurement confirms the substitution of Cr-atoms in host lattice. Magnetic and electrical transport measurements are used to explore the superconducting properties where Cr-substituted compounds show improvement in superconducting diamagnetic fraction with same T-c as undoped one Heat capacity measurement confirms the bulk superconducting properties of compounds. Thermopower measurement characterizes the type of charge carriers in normal state. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Keywords: Iron chalcogenide; Substitution; Thermopower; Strong correlation
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 20 Apr 2015 07:07
Last Modified: 20 Apr 2015 07:07
URI: http://eprints.iisc.ac.in/id/eprint/51233

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