skip to main content

DOE PAGESDOE PAGES

Title: 57Fe Mössbauer study of stoichiometric iron-based superconductor CaKFe 4As 4: a comparison to KFe 2As 2 and CaFe 2As 2

57Fe Mössbauer spectra at different temperatures between ~5 and ~300 K were measured on an oriented mosaic of single crystals of CaKFe 4 As 4. The data indicate that is a well formed compound with narrow spectral lines, no traces of other, Fe – containing, secondary phases in the spectra and no static magnetic order. There is no discernible feature at the superconducting transition temperature in any of the hyperfine parameters. The temperature dependence of the quadrupole splitting approximately follows the empirical ‘ T 3/2 law’. Furthermore, the hyperfine parameters of CaKFe 4 As 4 are compared with those for measured in this work, and the literature data for CaFe 2 As 2, and were found to be in between those for these two, ordered, 122 compounds, in agreement with the gross view of CaKFe 4 As 4 as a structural analog of KFe 2 As 2 and CaFe 2 As 2 that has alternating Ca- and K-layers in the structure.
Authors:
 [1] ; ORCiD logo [2] ;  [1] ;  [3] ;  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Princeton Univ., Princeton, NJ (United States)
  3. Chinese Academy of Sciences, Beijing (China); South Univ. of Science and Technology of China, Shenzhen (China)
Publication Date:
Report Number(s):
IS-J-9429
Journal ID: ISSN 1478-6435
Grant/Contract Number:
GBMF4411; AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Philosophical Magazine (2003, Print)
Additional Journal Information:
Journal Name: Philosophical Magazine (2003, Print); Journal Volume: 97; Journal Issue: 29; Journal ID: ISSN 1478-6435
Publisher:
Taylor & Francis
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconductors; Mössbauer spectroscopy; hyperfine parameters
OSTI Identifier:
1379173

Bud’ko, Sergey L., Kong, Tai, Meier, William R., Ma, Xiaoming, and Canfield, Paul C.. 57Fe Mössbauer study of stoichiometric iron-based superconductor CaKFe4As4: a comparison to KFe2As2 and CaFe2As2. United States: N. p., Web. doi:10.1080/14786435.2017.1347726.
Bud’ko, Sergey L., Kong, Tai, Meier, William R., Ma, Xiaoming, & Canfield, Paul C.. 57Fe Mössbauer study of stoichiometric iron-based superconductor CaKFe4As4: a comparison to KFe2As2 and CaFe2As2. United States. doi:10.1080/14786435.2017.1347726.
Bud’ko, Sergey L., Kong, Tai, Meier, William R., Ma, Xiaoming, and Canfield, Paul C.. 2017. "57Fe Mössbauer study of stoichiometric iron-based superconductor CaKFe4As4: a comparison to KFe2As2 and CaFe2As2". United States. doi:10.1080/14786435.2017.1347726. https://www.osti.gov/servlets/purl/1379173.
@article{osti_1379173,
title = {57Fe Mössbauer study of stoichiometric iron-based superconductor CaKFe4As4: a comparison to KFe2As2 and CaFe2As2},
author = {Bud’ko, Sergey L. and Kong, Tai and Meier, William R. and Ma, Xiaoming and Canfield, Paul C.},
abstractNote = {57Fe Mössbauer spectra at different temperatures between ~5 and ~300 K were measured on an oriented mosaic of single crystals of CaKFe4 As4. The data indicate that is a well formed compound with narrow spectral lines, no traces of other, Fe – containing, secondary phases in the spectra and no static magnetic order. There is no discernible feature at the superconducting transition temperature in any of the hyperfine parameters. The temperature dependence of the quadrupole splitting approximately follows the empirical ‘T3/2 law’. Furthermore, the hyperfine parameters of CaKFe4 As4 are compared with those for measured in this work, and the literature data for CaFe2 As2, and were found to be in between those for these two, ordered, 122 compounds, in agreement with the gross view of CaKFe4 As4 as a structural analog of KFe2 As2 and CaFe2 As2 that has alternating Ca- and K-layers in the structure.},
doi = {10.1080/14786435.2017.1347726},
journal = {Philosophical Magazine (2003, Print)},
number = 29,
volume = 97,
place = {United States},
year = {2017},
month = {7}
}