MossWinn—methodological advances in the field of Mössbauer data analysis

Klencsár, Zoltán

doi:10.1007/978-94-007-6491-0_15

Cited by 17 publications

(27 citation statements)

References 4 publications

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“…Then, three rounds of measurements, progressively focusing in on temperatures near T c = 6.1 K, were carried out: collecting 24 h with maximum velocity 2 mm/s from 4.3 K to 293.8 K (S1); collecting 48 h with maximum velocity 3 mm/s from 4.4 K to 10 K (S2); collecting 48 h with maximum velocity 3 mm/s from 4.7 K to 6.4 K (S3). All the Mössbauer spectra were fitted by the commercial software package MossWinn [21], in which the standard error of parameters can be estimated either by calculating and inverting the curvature matrix of the χ 2 with respect to the fit parameters, or by the Monte Carlo method. The standard error of IS, quadroupole splitting (QS) and line width (Γ) in this work were obtained from the curvature matrix, while the error the area under the spectra here were obtained by Monte Carlo method by iterating 100 times.…”

Section: Methodsmentioning

confidence: 99%

57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

Ran

Pang

et al. 2015

Journal of Physics and Chemistry of Solids

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With the advent of Fe-As based superconductivity it has become important to study how superconductivity manifests itself in details of 57 Fe Mössbauer spectroscopy of conventional, Fe -bearing superconductors. To this end, the iron-based superconductor Lu2Fe3Si5 has been studied by 57 Fe Mössbauer spectroscopy over the temperature range from 4.4 K to room temperature with particular attention to the region close to the superconducting transition temperature (Tc = 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 Tc, nor phonon softening were observed.

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Section: Methodsmentioning

confidence: 99%

57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

Ran

Pang

et al. 2015

Journal of Physics and Chemistry of Solids

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“…In conclusion, we confidently identified a hedgehog spin-vortex crystal in Co-and Ni-doped After one to two hours at this final temperature the growth assembly was removed from the furnace, inverted into a centrifuge, and spun to decant the remaining liquid off the crystals 35 . The The Mössbauer spectra were fitted using the commercial software package MossWinn 4.0Pre 36 .…”

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confidence: 99%

Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor

et al. 2018

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Magnetism is widely considered to be a key ingredient of unconventional superconductivity.In contrast to cuprate high-temperature superconductors, antiferromagnetism in Fe-based superconductors (FeSCs) is characterized by a pair of magnetic propagation vectors 1, 2 . Consequently, three different types of magnetic order are possible. Of theses, only stripe-type spin-density wave (SSDW) and spin-charge-density wave (SCDW) orders have been observed 2-4 . A realization of the proposed spin-vortex crystal (SVC) order is noticeably absent. We report a magnetic phase consistent with the hedgehog variation of SVC order in Ni-and Co-doped CaKFe 4 As 4 based on thermodynamic, transport, structural and local magnetic probes combined with symmetry analysis. The exotic SVC phase is stabilized by the reduced symmetry of the CaKFe 4 As 4 structure.Our results suggest that the possible magnetic ground states in FeSCs have very similar energies, providing an enlarged configuration space for magnetic fluctuations to promote high-temperature superconductivity.

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“…97 such as humic and fulvic acids, exagluconate (GA), amino acids and citrate are ecophysiological studies (Baker, 2008). In the present paper, the instrument developed 300 the applied fit model we assumed a quadrupole splitting distribution having Gaussian 22 23 24 301 shape and applied the VBF method (Rancourt & Ping, 1991) as implemented in the 25 26 302 MOSSWIN software (Klencsár, 2015). The isomer shift (~0.5 mms -1 ) and quadruploe In order to monitor the chlorosis symptoms in the leaves after the treatment 339 variability of the fluorescence data (error bars in figure 4B) was higher than the SPAD 3 4 340 data (error bars in fig 4C).…”

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confidence: 99%

Response of soybean plants to the application of synthetic and biodegradable Fe chelates and Fe complexes

Martín-Fernández

Solti

Czech

et al. 2017

Plant Physiology and Biochemistry

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The growing concern over the environmental risk of synthetic chelate application promotes the search for alternatives in Fe fertilization, such as biodegradable chelating agents and natural complexing agents. In this work, plant responses to the application of several Fe treatments (chelates and complexes) was analyzed to study their potential use in Fe fertilization under calcareous conditions. Thus, the root ferric chelate reductase (FCR) activity of soybean (Glycine max cv. Klaxon) plants was determined, and the effectiveness of the Fe chelates and complexes assessed in a pot experiment, by SPAD and fluorescence induction measurements, and the determination of Fe distribution in plant and soil. Additionally, Fe Mössbauer spectroscopy was conducted to identify the Fe forms present in the soybean roots. The highest FCR activity was observed for the chelates EDDS/Fe and IDHA/Fe; while no activity was observed when using complexes as Fe substrates. In contrast to the FCR data, the pot experiment confirmed that the o,oEDDHA/Fe is the most effective treatment, and the complexes LS/Fe and GA/Fe are able to alleviate Fe chlorosis, also indicated by SPAD data and the maximal quantum efficiency of photosystem II reaction centers as vitality parameters, and the enhanced plant uptake of Fe from natural sources.

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MossWinn—methodological advances in the field of Mössbauer data analysis

Cited by 17 publications

References 4 publications

57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

57Fe Mössbauer study of Lu2Fe3Si5 iron silicide superconductor

Hedgehog spin-vortex crystal stabilized in a hole-doped iron-based superconductor

Response of soybean plants to the application of synthetic and biodegradable Fe chelates and Fe complexes

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