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Title: Effect of nonmagnetic defects on superconducting and transport properties of Ba(Fe{sub 1–x}Co{sub x}As){sub 2} high-T{sub c} superconductors

The effect of nonmagnetic defects on superconducting and transport properties of Ba(Fe{sub 0.94}Co{sub 0.06}As){sub 2} films is studied for obtaining information on the symmetry type of the order parameter for superconducting pnictides. Such defects are generated in the film by irradiation by He{sup +} ions with an energy of 200 keV. It is found that a decrease in superconducting transition temperature T{sub c} upon an increase in the concentration of nonmagnetic defects in this compound occurs much more slowly than predicted in the model assuming s{sup ±}-wave symmetry of the order parameter. Joint analysis of the influence of nonmagnetic defects on the superconducting and magnetotransport properties of such films leads to the conclusion that superconductivity is completely suppressed in them after critical disorder is attained, which assumes the s{sup ++}-wave symmetry.
Authors:
;  [1] ;  [2] ;  [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [3] ; ;  [1]
  1. Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation)
  2. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
  3. Leibniz Institute for Solid State and Materials Research (Germany)
Publication Date:
OSTI Identifier:
22471997
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 121; Journal Issue: 5; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTROSCOPY; BARIUM COMPOUNDS; COBALT COMPOUNDS; CONCENTRATION RATIO; FILMS; HELIUM IONS; HIGH-TC SUPERCONDUCTORS; ION IMPLANTATION; IRON ARSENIDES; IRRADIATION; KEV RANGE; ORDER PARAMETERS; RADIATION EFFECTS; SUPERCONDUCTIVITY; TRANSITION TEMPERATURE; X-RAY SPECTROSCOPY