Evolution of the hyperfine parameters of Fe in superconducting LiFeAs as observed by 57Fe Mössbauer spectroscopy

W. B. Gao, J. Lindén*, X.C. Wang, C. Q. Jin, T. Tohyama, M. Karppinen, H. Yamauchi

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    The LiFeAs superconductor is studied by 57Fe Mössbauer spectroscopy to detect possible changes in the hyperfine parameters in terms of temperature upon passing the superconductivity-transition-temperature at ∼16 K. With decreasing temperature, a rather fast growth of spectral area and isomer shift below Tc, peaking at ∼6 K was seen. This indicates an increase in the stiffness of the lattice followed by softening.

    Original languageEnglish
    Pages (from-to)1525-1528
    Number of pages4
    JournalSolid State Communications
    Volume150
    Issue number33-34
    DOIs
    Publication statusPublished - Sep 2010
    MoE publication typeA1 Journal article-refereed

    Keywords

    • A. Pnictide superconductors
    • D. Lattice softening
    • E. Fe Mössbauer spectroscopy
    • E. Hyperfine interactions

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