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Institute of High Pressure Physics

(Polish Academy of Sciences)

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Experimental Data for Fluorine-Substituted SmFeAsO Superconductors Synthesized by High-Pressure Growth

Version 1.0

Singh, Shiv, 2026, "Experimental Data for Fluorine-Substituted SmFeAsO Superconductors Synthesized by High-Pressure Growth", https://doi.org/10.18150/CTXJCY, RepOD, V1

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Description

This dataset contains experimental data for fluorine-substituted SmFeAsO1−xFx superconductors synthesized using a high-pressure growth technique. The deposited files include powder X-ray diffraction (XRD) patterns, Raman spectra, temperature-dependent electrical resistivity measurements, magneto-resistivity data collected under applied magnetic fields, Arrhenius analyses derived from magneto-resistivity measurements, magnetization measurements, and the fluorine substitution-dependent phase diagram constructed from transport and magnetic characterization data.

The XRD data were collected to determine crystal structure, phase purity, and lattice parameters. Raman spectroscopy measurements were performed to investigate vibrational properties and structural evolution with fluorine substitution. Electrical resistivity and magneto-resistivity measurements were carried out over a range of temperatures and magnetic fields to evaluate superconducting transition temperatures and vortex dynamics. Magnetization measurements were used to characterize the superconducting and magnetic properties of the samples. The phase diagram summarizes the evolution of structural and superconducting properties as a function of fluorine concentration.

The dataset includes raw and processed data files used to generate the figures and analyses reported in the associated publication. Data are provided in text-based formats suitable for independent verification, reanalysis, and reuse by researchers studying iron-based superconductors.

Please note that:

In the publication: Figure2 presents representative backscattered electron (BSE) images of SmFeAsO1−xFx samples obtained by scanning electron microscopy (SEM). No numerical data files are associated with this figure; therefore, no dataset is included for Figure 2.

(2026-06-23)

Subject

Physics

Keyword

Iron-based superconductors, High-Tc superconductors, Critical transition temperature

Related Publication

Mohammad Azam, Tatiana Zajarniuk, Ryszard Diduszko, Taras Palasyuk, Cezariusz Jastrzebski, Andrzej Szewczyk, Hiraku Ogino, and Shiv J. Singh

Fluorine substitution‑dependent phase diagram and superconducting properties of Sm‑based oxypnictides synthesized by a high‑pressure growth technique

J Mater Sci: Mater Electron 37, 385 (2026) https://doi.org/10.1007/s10854-026-16794-z doi: 10.1007/s10854-026-16794-z

License

CC BY - Creative Commons Attribution 4.0

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1 to 8 of 8 Files

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		README_JMSME.txt Plain Text - 10.9 KB - Jun 25, 2026 - 0 Downloads MD5: d21cccd956377eece902a04f2daf8bae License: CC BY - Creative Commons Attribution 4.0 This file provides documentation for the dataset, including a description of the dataset contents, directory structure, file formats, variables, units, measurement methods, software requirements, and licensing information. It is intended to help users understand, interpret, and reuse the data independently of the associated publication.	Preview Download
		Figure1.zip ZIP Archive - 207.0 KB - Jun 25, 2026 - 0 Downloads MD5: 83da453fffe30f5f1c37dcf47cf33f36 License: CC BY - Creative Commons Attribution 4.0 Figure1.zip contains powder X-ray diffraction (XRD) data for SmFeAsO1−xFx samples with nominal fluorine concentrations x = 0.0–0.4. The files include diffraction intensity as a function of 2θ, along with lattice parameters (a and c) and unit-cell volume (V) obtained from structural refinement. These data were used to investigate phase formation and the evolution of crystal structure with fluorine substitution.	Download
		Figure3.zip ZIP Archive - 1.1 KB - Jun 25, 2026 - 0 Downloads MD5: 9ccd82b3e92340117d05da2582d8842e License: CC BY - Creative Commons Attribution 4.0 Figure3.zip contains Raman peak position data (Raman shift, cm⁻¹) as a function of fluorine content (xF) in SmFeAsO1−xFx samples. The files include the extracted Raman mode frequencies used to analyze the evolution of lattice vibrations and structural changes associated with fluorine substitution.	Download
		Figure4.zip ZIP Archive - 134.1 KB - Jun 25, 2026 - 0 Downloads MD5: 8e86caa7449cb0990918fdde5424f502 License: CC BY - Creative Commons Attribution 4.0 Figure4.zip contains temperature-dependent electrical resistivity data, ρ(T), for SmFeAsO1−xFx bulk samples with different nominal fluorine concentrations. The files include resistivity values measured as a function of temperature, together with derived superconducting and normal-state parameters, including superconducting onset temperature (Tc,onset), transition width (ΔT), room-temperature resistivity (ρ300K), and residual resistivity ratio (RRR). These data were used to evaluate the effect of fluorine substitution on the transport and superconducting properties of the samples.	Download
		Figure5.zip ZIP Archive - 39.4 KB - Jun 25, 2026 - 0 Downloads MD5: 7badfaff5f72ac7d6dc3e9017373a0dd License: CC BY - Creative Commons Attribution 4.0 Figure5.zip contains magneto-resistivity data for SmFeAsO1−xFx samples (x = 0.05, 0.25, and 0.40) measured under applied magnetic fields from 0 to 9 T over a temperature range up to 60 K. The files include temperature-dependent resistivity data collected at different magnetic fields and the corresponding upper critical field (Hc2) and irreversibility field (Hirr) values determined from the resistivity measurements. These data were used to evaluate the magnetic-field response and superconducting properties of the samples.	Download
		Figure6.zip ZIP Archive - 29.2 KB - Jun 25, 2026 - 0 Downloads MD5: 0cc06c619a629a5447463a606af9bb27 License: CC BY - Creative Commons Attribution 4.0 Figure6.zip contains Arrhenius analysis data derived from magneto-resistivity measurements of SmFeAsO1−xFx samples (x = 0.05, 0.25, and 0.40) under applied magnetic fields from 0 to 9 T. The files include normalized resistivity data as a function of inverse temperature (1/T) used to determine the thermally activated flux-flow activation energy. The dataset also contains field-dependent activation energy values extracted from the Arrhenius analysis, which were used to investigate vortex dynamics and flux-pinning behavior in the superconducting samples.	Download
		Figure7.zip ZIP Archive - 105.8 KB - Jun 25, 2026 - 0 Downloads MD5: 7bf713edc457bb147eaa3027c26a3a2b License: CC BY - Creative Commons Attribution 4.0 Figure7.zip contains temperature-dependent normalized magnetic moment data (M/M5K) measured under zero-field-cooled (ZFC) and field-cooled (FC) conditions in an applied field of 20 Oe, together with critical current density (Jc) data at 5 K as a function of applied magnetic field. These measurements were used to evaluate the superconducting transition and flux-pinning properties of SmFeAsO1−xFx samples.	Download
		Figure8.zip ZIP Archive - 1.1 KB - Jun 25, 2026 - 0 Downloads MD5: 2f9c4ea74748f5fdd516047cd56d90fd License: CC BY - Creative Commons Attribution 4.0 Figure8.zip contains superconducting transition temperature (Tc) and critical current density (Jc) data as a function of nominal fluorine substitution content (x) in SmFeAsO1−xFx samples. These data were compiled from transport and magnetic measurements to evaluate the influence of fluorine doping on the superconducting performance of the samples.	Download

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