Data from: Comprehensive analysis of sm-substituted CoFe₂O₄ nanoferrites: Structural insights and functional applications
Data files
Mar 16, 2026 version files 1.51 MB
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Crystallitesize-Strain_Fig.6.xlsx
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Fig_2_.1_ORIGIN_DATA_SAMARIUM__with_Base_line_cor.xlsx
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Fig-4-mW-H-Plots.xlsx
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Fig._7_Excel_format_ATR-FTIR.xlsx
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Fig.2PXRD_excel_data.xls
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Fig.8.zip
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Fig11.zip
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Histograms_Fig.9.xlsx
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Lattice_and_Density_Fig.3.xlsx
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Readme_Fig.11.txt
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Readme_Fig.3.txt
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Readme_Fig.4.txt
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Readme_Fig.5.txt
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Readme_Fig.6.txt
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Readme_Fig.7.txt
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Readme_Fig.8.txt
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Readme_Fig.9.txt
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Readme_Fig2_PXRD.txt
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README.md
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Size-Strain-Plots_data_Fig.5.xlsx
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Abstract
Samarium-doped nanocrystalline cobalt ferrites with the chemical formula CoFe2-xSmxO4 were synthesized using the sol-gel auto-combustion method. The as-prepared samples were characterized by PXRD to confirm the spinel ferrite phase, and the average crystallite size was 10–20 nm. X-ray peak profile analysis models revealed that the gradual decrement of the induced micro-strain led to a low crystallite size with samarium ions. The characteristic vibrational band of the CoFe2-xSmxO4 samples observed by FTIR spectroscopy at 548.5 cm-1 confirmed the inverse spinel structure. The theoretical approach for UV-Visible spectrophotometer data indicates semiconductor characteristics. The micrographs of the sintered samples were examined using FESEM, and quantitative analysis was performed using EDXS. The VSM at room temperature revealed a gradual decrease in the magnetic anisotropy constant (K), retentivity (Mr), squareness ratio (SQR), and saturation magnetization (Ms) for all samples, but the coercivity (Hc) slightly increased at x=0.15%, revealing a weak A-B interaction observed for the degradation of magnetic energy. The phase stability evaluated regarding the tolerance factor using the proposed cationic distribution of the samples showed well-defined values, implying a mixed inverse spinel structure. The findings reveal the effects of Sm3+ on the structural, morphological, and magnetic properties of Co ferrites for functional applications.
Description of the data and file structure
1. Samarium-doped nanocrystalline cobalt ferrites (CoFe2-xSmxO4) successfully synthesized by the sol-gel autocombustion method.
2.The inverse spinel structure and phase of the as-prepared samples have been systematically evaluated by X-ray peak profile analysis models.
3.Shifting frequency of molecular bonds for all the samples were examined at stretching or bending vibrations.
4.Semiconductor nature of prepared samples noticed by using a common theoretical approach
5.The variation of Ms along with Hc has been observed while increasing Sm3+ concentration.
There is little literature survey on rare earth (RE) ion-sm3+ doped nanocrystalline cobalt ferrites in which outstanding samarium can alter the structural, vibrational and magnetic properties of cobalt ferrites. This research study explores the structural, vibrational, and magnetic properties of CoFe2-xSmxO4 particles via qualitative sol-gel method. The high positive micro-strain effect of as-prepared samples observed with the help of modified Williamson-Hall method (+0.193 x 10 -3), and size-strain plot (+1.360 x 10 -3) which is consistent with the increased crystal plane spacing (d=2.606 Å) at 0.20%. Furthermore, high coercive field and low saturation magnetization at x=0.15% supports the soft-ferrimagnetic nature. In addition, the tolerance factor estimated for prepared CoFe2-xSmxO4nanostructure samples shows a good agreement with the reports of inverse spinel ferrite crystal structure. The spin-disorder samarium doped cobalt ferrite magnetic crystals at nanoscale dimensions have versatile applications in the field of radiation shielding, high frequency applications, magnetic resonance imaging, optical displays, and robotic magnetic sensors
This dataset file contains the data and descriptions of all experimental parameters required to construct the graphs presented in the manuscript.
Subfolders contain adjacent readme.txt files with context for the associated files.
Code/software
The original data files can be opened using Microsoft Excel to construct the graphs.
Access information
- Other publicly accessible locations of the data:
None
- Data was derived from the following sources:
- XRD (X-Ray Diffraction): Offered information on crystallographic structures and phase composition.
- FTIR (Fourier Transform Infrared Spectroscopy): Captured data on functional groups and chemical bonding.
- UV-Vis Spectroscopy: Measured optical properties.
- Field Emission Scanning Electron Microscopy (FE-SEM) & EDAX: Provided the surface morphology and elemental analysis of the samples.
- Vibrating Sample Magnetometer (VSM): Provided the Magnetic characteristics of the sample.
The data were collected as part of an experimental effort to characterize the CoFe2-xSmxO4 (0.00≤x≤0.25) samples. Powder X-ray diffraction (XRD) analysis was employed to examine the phase and crystal structure. Which also provides the information about Estimation of interatomic spacing (d), lattice constant (a), crystallite size (D), and microstructural components, Scherrer’s equation (SCR), Modified Williamson-Hall (mW-H) method, Size-strain plot, Cationic distribution & Tolerance factor (τ). Fourier Transform Infrared Spectroscopy (FTIR) provided information on the functional groups and chemical bonding. UV-Vis spectroscopy was conducted to study the semiconductor characteristics of CoFe2-xSmxO4 samples. Field Emission Scanning Electron Microscopy was employed to examine the morphology and grain size of the samples. The elemental compositions of the samples were determined by EDAX analysis. The magnetic characteristics were studied using Vibrating Sample Magnetometer (VSM) data analysis.
These comprehensive experimental techniques ensured a thorough understanding of both the structural and magnetic properties of the materials.