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|Title:||Enhanced superconducting properties in FeCr(x)Se|
|Publisher:||PERGAMON-ELSEVIER SCIENCE LTD|
|Citation:||SOLID STATE COMMUNICATIONS,151(7)557-560|
|Abstract:||We report an enhancement of the superconducting transition temperature (T(c)) when chromium (Cr) is substituted in excess at the iron (Fe) site (FeCr(x)Se, x = 0.01, 0.02 and 0.03). There is a corresponding increase in the superconducting volume fraction with T(c) attaining a value of 11.2 K on 2% Cr substitution when compared to a T(c) of 8.5 K for the conventional tetragonal Fe-excess sample Fe(1+x)Se. The results point to the role of chemical pressure (introduced via ionic size variation at the Fe site upon Cr substitution in excess) on superconducting properties. (C) 2011 Elsevier Ltd. All rights reserved.|
|Appears in Collections:||Article|
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