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Fe-57 Mossbauer study of Lu2Fe3Si5 iron silicide superconductor

TitleFe-57 Mossbauer study of Lu2Fe3Si5 iron silicide superconductor
Publication TypeJournal Article
Year of Publication2015
AuthorsMa, XM, Ran, S, Pang, H, Li, FS, Canfield, PC, Bud'ko, SL
JournalJournal of Physics and Chemistry of Solids
Volume83
Pagination58-63
Date Published08
Type of ArticleArticle
ISBN Number0022-3697
Accession NumberWOS:000355365800009
Keywordsbehavior, magnetism, Mossbauer spectroscopy, rare-earth, silicides, Specific heat, structural instability, superconductors, t-c, temperature-dependence, vibrational
Abstract

With the advent of Fe-As based superconductivity it has become important to study how superconductivity manifests itself in details of Fe-57 Mossbauer spectroscopy of conventional, Fe-bearing superconductors. To this end, the iron-based superconductor Lu2Fe3Si5 has been studied by Fe-57 Mossbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (T-c=6.1 K). Consistent with the two crystallographic sites for Fe in this structure, the observed spectra appear to have a pattern consisting of two doublets over the whole temperature range. The value of Debye temperature was estimated from temperature dependence of the isomer shift and the total spectral area and compared with the specific heat capacity data. Neither abnormal behavior of the hyperfine parameters at or near T-c, nor phonon softening were observed. (C) 2015 Elsevier Ltd. All rights reserved.

DOI10.1016/j.jpcs.2015.03.021
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Complex States