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

doi:10.1016/j.ssc.2010.06.010

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 journal › Article › Scientific › peer-review

7 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 language	English
Pages (from-to)	1525-1528
Number of pages	4
Journal	Solid State Communications
Volume	150
Issue number	33-34
DOIs	https://doi.org/10.1016/j.ssc.2010.06.010
Publication status	Published - Sept 2010
MoE publication type	A1 Journal article-refereed

Funding

We thank Mr. K. Irie for his assistance in some Mössbauer measurements. Financial support was provided by the following sources: NSF & MOST of China (through research projects), GCOE Exchange Student Support (Tokyo Tech), International Collaborative Research Project 2008 of MSL (Tokyo Tech), Åbo Akademi Foundation, Tekes (No. 1726/31/07 ) and Academy of Finland (No. 126528 ).

Keywords

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

Access to Document

10.1016/j.ssc.2010.06.010

Cite this

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title = "Evolution of the hyperfine parameters of Fe in superconducting LiFeAs as observed by 57Fe M{\"o}ssbauer spectroscopy",

abstract = "The LiFeAs superconductor is studied by 57Fe M{\"o}ssbauer 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.",

keywords = "A. Pnictide superconductors, D. Lattice softening, E. Fe M{\"o}ssbauer spectroscopy, E. Hyperfine interactions",

author = "Gao, \{W. B.\} and J. Lind{\'e}n and X.C. Wang and Jin, \{C. Q.\} and T. Tohyama and M. Karppinen and H. Yamauchi",

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T1 - Evolution of the hyperfine parameters of Fe in superconducting LiFeAs as observed by 57Fe Mössbauer spectroscopy

AU - Gao, W. B.

AU - Lindén, J.

AU - Wang, X.C.

AU - Jin, C. Q.

AU - Tohyama, T.

AU - Karppinen, M.

AU - Yamauchi, H.

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N2 - 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.

AB - 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.

KW - A. Pnictide superconductors

KW - D. Lattice softening

KW - E. Fe Mössbauer spectroscopy

KW - E. Hyperfine interactions

UR - https://www.scopus.com/pages/publications/77955420281

U2 - 10.1016/j.ssc.2010.06.010

DO - 10.1016/j.ssc.2010.06.010

M3 - Article

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JF - Solid State Communications

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