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Title: Fabrication and characterization of SmO{<_0.7}F{<_2}FeAs bulk with a transition temperature of 56.5K.

Abstract

The superconductivity of iron-based superconductor SmO{sub 0.7}F{sub 0.2}FeAs was investigated. The SmO{sub 0.7}F{sub 0.2}FeAs sample was prepared by the two-step solid-state reaction method. The onset resistivity transition temperature is as high as 56.5 K. X-ray diffraction (XRD) results show that the lattice parameters a and c are 0.39261 and 0.84751 nm, respectively. Furthermore, the global J{sub c} was more than 2.3 x 10{sup 5} A/cm2 at T = 10 K and H = 9 T, which was calculated by the formula of J{sub c} = 20 {Delta} M/[a(1 - a/(3b))]. The upper critical fields, H{sub c2} {approx} 256 T (T = 0 K), was determined according to the Werthamer-Helfand-Hohenberg formula, indicating that the SmO{sub 0.7}F{sub 0.2}FeAs was a superconductor with a very promising application.

Authors:
; ; ; ;  [1];  [2];  [2]
  1. (Materials Science Division)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); National Basic Research Program in China; National Natural Science Foundation of China (NNSFC); National High Technology Research and Development Program of China
OSTI Identifier:
1029880
Report Number(s):
ANL/MSD/JA-71450
TRN: US201123%%450
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Rare Metals
Additional Journal Information:
Journal Volume: 30; Journal Issue: 5
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRITICAL FIELD; FABRICATION; LATTICE PARAMETERS; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TRANSITION TEMPERATURE; X-RAY DIFFRACTION

Citation Formats

Liu, Z., Ma, L., Zhao, J., Yan, B., Suo, H., Beijing Univ. Tech.), and Univ. Illinois-Chicago). Fabrication and characterization of SmO{<_0.7}F{<_2}FeAs bulk with a transition temperature of 56.5K.. United States: N. p., 2011. Web. doi:10.1007/s12598-011-0418-y.
Liu, Z., Ma, L., Zhao, J., Yan, B., Suo, H., Beijing Univ. Tech.), & Univ. Illinois-Chicago). Fabrication and characterization of SmO{<_0.7}F{<_2}FeAs bulk with a transition temperature of 56.5K.. United States. doi:10.1007/s12598-011-0418-y.
Liu, Z., Ma, L., Zhao, J., Yan, B., Suo, H., Beijing Univ. Tech.), and Univ. Illinois-Chicago). Sat . "Fabrication and characterization of SmO{<_0.7}F{<_2}FeAs bulk with a transition temperature of 56.5K.". United States. doi:10.1007/s12598-011-0418-y.
@article{osti_1029880,
title = {Fabrication and characterization of SmO{<_0.7}F{<_2}FeAs bulk with a transition temperature of 56.5K.},
author = {Liu, Z. and Ma, L. and Zhao, J. and Yan, B. and Suo, H. and Beijing Univ. Tech.) and Univ. Illinois-Chicago)},
abstractNote = {The superconductivity of iron-based superconductor SmO{sub 0.7}F{sub 0.2}FeAs was investigated. The SmO{sub 0.7}F{sub 0.2}FeAs sample was prepared by the two-step solid-state reaction method. The onset resistivity transition temperature is as high as 56.5 K. X-ray diffraction (XRD) results show that the lattice parameters a and c are 0.39261 and 0.84751 nm, respectively. Furthermore, the global J{sub c} was more than 2.3 x 10{sup 5} A/cm2 at T = 10 K and H = 9 T, which was calculated by the formula of J{sub c} = 20 {Delta} M/[a(1 - a/(3b))]. The upper critical fields, H{sub c2} {approx} 256 T (T = 0 K), was determined according to the Werthamer-Helfand-Hohenberg formula, indicating that the SmO{sub 0.7}F{sub 0.2}FeAs was a superconductor with a very promising application.},
doi = {10.1007/s12598-011-0418-y},
journal = {Rare Metals},
number = 5,
volume = 30,
place = {United States},
year = {2011},
month = {10}
}