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Title: Microstructure refinement and enhanced critical current density in binary doped SmFeAsO superconductor

The iron-pnictide Sm{sub 1−x}Ca{sub x}FeAsO{sub 1−2x}F{sub 2x} superconductor was prepared and the combined effect of electron and hole doping was studied in detail. It is observed that the binary doping using CaF{sub 2} improves the microstructure tremendously with a preferred orientation of the (00l) planes. Moreover, a maximum T{sub C} of 53.8 K and a transport J{sub C} of 880 A/cm{sup 2} (12 K), which is double to that of the F-doped sample, are achieved. The dopant CaF{sub 2} seems to be a potential candidate for solving the grain-connectivity concerns in iron-pnictides paving the way towards conductor development.
Authors:
; ; ;  [1] ;  [2]
  1. National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum- 695 019 (India)
  2. National Physical Laboratory (CSIR), Delhi-110012 (India)
Publication Date:
OSTI Identifier:
22269356
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CALCIUM FLUORIDES; CRITICAL CURRENT; CURRENT DENSITY; DOPED MATERIALS; GRAIN ORIENTATION; IRON; PNICTIDES; SUPERCONDUCTORS