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Institute of High Pressure Physics

(Polish Academy of Sciences)

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Experimental Structural, Raman, Transport, and Magnetic Characterization Data for Fluorine-Doped PrFeAsO1−xFx Superconductors

Version 1.0

Singh, Shiv, 2026, "Experimental Structural, Raman, Transport, and Magnetic Characterization Data for Fluorine-Doped PrFeAsO1−xFx Superconductors", https://doi.org/10.18150/YBMEGN, RepOD, V1

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Description

This dataset contains experimental data for fluorine-substituted PrFeAsO_1−xF_x superconductors synthesized by a conventional solid-state reaction method over the nominal fluorine concentration range 0.0 ≤ x ≤ 1.0. The dataset includes powder X-ray diffraction (XRD) patterns, structural refinement results, actual fluorine concentrations determined by energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy measurements, electrical resistivity and magneto-resistivity data, Arrhenius analyses derived from magneto-resistivity measurements, magnetic susceptibility measurements, specific-heat data, and the fluorine substitution-dependent electronic phase diagram.

The XRD data were collected using a Rigaku SmartLab diffractometer and were used to determine phase composition, lattice parameters, and unit-cell volume. Raman spectroscopy measurements were performed using a Horiba Jobin Yvon LabRAM ARAMIS spectrometer to investigate the evolution of lattice vibrational modes with fluorine substitution. Electrical resistivity and magneto-resistivity measurements were carried out using the standard four-probe technique in a Physical Property Measurement System (PPMS) under magnetic fields up to 9 T. These measurements were used to determine superconducting transition temperatures, upper critical fields (H_c2), irreversibility fields (Hirr), and thermally activated flux-flow activation energies. Magnetic susceptibility measurements were performed using a vibrating sample magnetometer (VSM) integrated into the PPMS under zero-field-cooled (ZFC) and field-cooled (FC) conditions. Specific-heat measurements were conducted under magnetic fields from 0 to 9 T to investigate the thermodynamic properties of the superconducting state.

The dataset provides structural, compositional, Raman spectroscopic, transport, thermodynamic, and magnetic characterization of PrFeAsO_1−xF_x compounds and supports the construction of the electronic phase diagram describing the evolution of magnetic order, superconductivity, and crystal structure as a function of fluorine concentration. The data are provided in text-based formats suitable for independent analysis, and reuse in future studies of iron-based superconductors.

(2026-06-24)

Subject

Physics

Keyword

Iron based superconductors, Critical transition temperature, Critical current density, Superconducting phase diagram

Related Publication

Priya Singh, Konrad Kwatek, Tatiana Zajarniuk, Taras Palasyuk, Cezariusz Jastrzębski, Andrzej Szewczyk, Shiv J. Singh

Electronic phase diagram and enhanced superconductivity in fluorine-doped PrFeAsO1-xFₓ

Journal of Alloys and Compounds 1072 (2026) 188942 https://doi.org/10.1016/j.jallcom.2026.188942 doi: 10.1016/j.jallcom.2026.188942

License

CC BY - Creative Commons Attribution 4.0

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		README_JAC.txt Plain Text - 16.2 KB - Jun 25, 2026 - 0 Downloads MD5: 92afd1c66e87fd6e22fddaa38d6c0181 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 - 624.4 KB - Jun 25, 2026 - 0 Downloads MD5: 5d47133d8b599606bdbed7f83d3d453e License: CC BY - Creative Commons Attribution 4.0 XRD/ Powder X-ray diffraction (XRD) data for PrFeAsO1−xFx samples (0.0 ≤ x ≤ 1.0) synthesized using a conventional solid-state reaction method. The files contain diffraction intensity as a function of 2θ, together with lattice parameters (a and c) and unit-cell volume (V) obtained from structural refinement. The directory also includes the actual fluorine concentrations (xact) determined by energy-dispersive X-ray spectroscopy (EDX) as a function of the nominal fluorine concentration (x).	Download
		Figure2.zip ZIP Archive - 6.2 KB - Jun 25, 2026 - 0 Downloads MD5: 2029caec62d05212987f0f9e11a83218 License: CC BY - Creative Commons Attribution 4.0 Raman spectroscopy measurements/ Raman spectroscopy data for PrFeAsO1−xFx samples. The files contain extracted Raman mode positions (Raman shift, cm⁻¹) used to investigate the evolution of lattice vibrations with fluorine substitution.	Download
		Figure3.zip ZIP Archive - 401.3 KB - Jun 25, 2026 - 0 Downloads MD5: d3365222aaf4d6ea2df5e595c8dcd448 License: CC BY - Creative Commons Attribution 4.0 Electrical resistivity data / Temperature-dependent electrical resistivity data measured under magnetic zero fields.	Download
		Figure4.zip ZIP Archive - 7.4 KB - Jun 25, 2026 - 0 Downloads MD5: 54e579fe688976680553c4defde91184 License: CC BY - Creative Commons Attribution 4.0 Electrical resistivity data / Temperature-dependent electrical resistivity data measured under magnetic zero fields for x = 0.3 in the low temperature range and extracted parameters from the zero field resistivity data.	Download
		Figure5.zip ZIP Archive - 27.4 KB - Jun 25, 2026 - 0 Downloads MD5: 21a9aaa4df32ac7c7bc10e5758dfbf6e License: CC BY - Creative Commons Attribution 4.0 Magneto-resistivity measurements/ Temperature-dependent electrical resistivity data measured under magnetic fields ranging from 0 to 9 T. The files include resistivity as a function of temperature and magnetic field, together with derived upper critical field (Hc2) and irreversibility field (Hirr) values. Arrhenius plots/ Arrhenius analysis data derived from magneto-resistivity measurements. The files contain normalized resistivity as a function of inverse temperature (1/T) and the corresponding thermally activated flux-flow activation energies extracted under different magnetic fields.	Download
		Figure6.zip ZIP Archive - 46.9 KB - Jun 25, 2026 - 0 Downloads MD5: f595f7b2685de82cae4d93a7edcde97f License: CC BY - Creative Commons Attribution 4.0 Magnetization measurements/ Magnetic characterization data for PrFeAsO1−xFx samples. The files include temperature-dependent magnetic susceptibility measured in zero-field-cooled (ZFC) and field-cooled (FC) modes under an applied magnetic field of 20 Oe.	Download
		Figure7.zip ZIP Archive - 31.1 KB - Jun 25, 2026 - 0 Downloads MD5: 6c2f506874ff9801009409df4af74f57 License: CC BY - Creative Commons Attribution 4.0 Specific heat measurements/ Temperature-dependent specific heat data presented as C/T over the measured temperature range under applied magnetic fields from μ0H = 0 T to 9 T for the PrFeAsO0.65F0.35 sample. These measurements were used to investigate the thermodynamic signature of the superconducting transition.	Download
		Figure8.zip ZIP Archive - 7.6 KB - Jun 25, 2026 - 0 Downloads MD5: 83ed91929e014a5e3559ab1ac10cb904 License: CC BY - Creative Commons Attribution 4.0 Specific heat measurements/ The temperature dependence of specific heat for PrFeAsO0.75F0.35 under different magnetic field and in the low temperature regions.	Download
		Figure9.zip ZIP Archive - 1.3 KB - Jun 25, 2026 - 0 Downloads MD5: 28b68ca84f03d91dcb8e23adfe93f6f6 License: CC BY - Creative Commons Attribution 4.0 Phase diagram/ Phase-diagram data compiled from structural, transport, magnetic, and thermodynamic measurements. The files include superconducting transition temperature (Tc) and critical current density (Jc) as a function of nominal fluorine concentration. The directory also contains the electronic phase diagram of PrFeAsO1−xFx, including the Néel temperature associated with the Fe spin-density-wave (SDW) transition (TNFe), the magnetic ordering temperature of Pr moments (TNPr), superconducting transition temperatures determined from resistivity measurements (Tc,onset), superconducting transition temperatures obtained from magnetization measurements (Tc,mag), and the superconducting transition temperature determined from specific heat measurements (Tc,spec). The dataset illustrates the evolution of magnetic order, superconductivity, and crystal structure across the full fluorine-substitution range, including the emergence of a non-superconducting cubic phase at high fluorine concentrations.	Download

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