Mössbauer study of BaTh2Fe4As4(N0.7O0.3)2

Reijo Pohjonen, Johan Lindén*, Bai-Zhuo Li, Guang Han Cao

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

A superconductive BaTh 2Fe 4As 4(N 0.7O 0.3) 2 oxypnictide sample is synthesized using a high-temperature solid-state reaction route. X-ray diffraction followed by Rietveld analysis is used for checking the phase content. 57Fe Mössbauer spectroscopy in transmission geometry is used for characterizing the hyperfine parameters of the iron site. Owing to the slightly deformed tetrahedral As coordination around Fe, the quadrupole coupling constant of Fe is nonzero, but small. This is visible in particular below 80 K. Judging by the consistency two Debye temperatures of 352 and 369 K values obtained using the total absorption and the second-order Doppler shift, a harmonic approximation for the phonon spectra can be assumed.

Original languageEnglish
Article number2100125
Journalphysica status solidi (b)
Volume258
Issue number10
DOIs
Publication statusPublished - Oct 2021
MoE publication typeA1 Journal article-refereed

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