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PreprintCC BYChemRxiv

Microstructural evolution, phase transformations and magnetic characteristics of Fe@Fe3O4@NaCl core-shell nanocomposites when varying the EB PVD synthesis temperature

  • Stanislav Ye. LYTVYN1,2
  • Oleksii S. BEZKROVNYI3,4
  • Orest PAVLOSIUK1,3,4
  • Dariusz ŁUKOWIEC2,3
  • Olena I. ORANSKA1,2,3,4
  • Yurii A. KURAPOV1,2,3,4
  • Vitalii V. BOIKO1,3
  • Damian SZYMAŃSKI1,2,3
  • Yaroslav A. STELMAKH1,2,3
  • Stanislav Lytvyn
4 affiliations
  1. 1Laboratory of Electron Beam Nanotechnology of Inorganic Materials for Medicine, E. O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine, 11 Kazymyr Malevych Street, Kyiv, Ukraine, 03150
  2. 2Institute of Engineering Materials and Biomaterials, Silesian University of Technology, Konarskiego 18A, Gliwice, Poland, 44100
  3. 3Wlodzimierz Trzebiatowski Institute of Low Temperature and Structure Research of the Polish Academy of Sciences
  4. 4Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine, 17 Henerala Naumova Str., Kyiv, Ukraine, 03164
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Abstract

The manuscript is devoted to a comprehensive study of the physicochemical, structural and magnetic properties of Fe-NaCl nanocomposite systems with an iron content of ~30 wt.%, synthesized by the electron beam physical vapor deposition (EB PVD) method at substrate temperatures (Ts) of 50 °C and 410 °C. Using SEM, STEM/HAADF, EDS, XRD, HRTEM, TGA and Raman spectroscopy, it was proven that the thermodynamic conditions of deposition critically determine the phase composition of nanoinclusions. The transition from completely oxidized, highly hydrated agglomerates of magnetite (Fe3O4, coherent scattering region size 17 nm) at 50 °C to the formation of isolated spherical nanoparticles (15.5 - 36 nm) of the "metal core - oxide shell" type at 410 °C was recorded (Fe@Fe3O4). The appearance of a highly crystalline α-Fe core is accompanied by an increase in remanent magnetization from 0.46 to 2.3 emu/g and the saturation magnetization from 16.0 to 24.0 emu/g. The structural perfection and thermal stability of the samples obtained at 410 °C make them promising for use in magnetic devices and ideal objects for studying the spatial distribution of magnetic fields by holographic electron microscopy (Holo-TEM).

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Cite

BibTeXRIS
BibTeX
@misc{lytvyn2026microstructural,
  title = {{Microstructural evolution, phase transformations and magnetic characteristics of Fe@Fe3O4@NaCl core-shell nanocomposites when varying the EB PVD synthesis temperature}},
  author = {Stanislav Ye. LYTVYN and Oleksii S. BEZKROVNYI and Orest PAVLOSIUK and Dariusz ŁUKOWIEC and Olena I. ORANSKA and Yurii A. KURAPOV and Vitalii V. BOIKO and Damian SZYMAŃSKI and Yaroslav A. STELMAKH and Stanislav Lytvyn},
  howpublished = {ChemRxiv},
  year = {2026},
  month = oct,
  doi = {10.26434/chemrxiv.15011036/v1},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011036/v1},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Microstructural evolution, phase transformations and magnetic characteristics of Fe@Fe3O4@NaCl core-shell nanocomposites when varying the EB PVD synthesis temperature
AU  - Stanislav Ye. LYTVYN
AU  - Oleksii S. BEZKROVNYI
AU  - Orest PAVLOSIUK
AU  - Dariusz ŁUKOWIEC
AU  - Olena I. ORANSKA
AU  - Yurii A. KURAPOV
AU  - Vitalii V. BOIKO
AU  - Damian SZYMAŃSKI
AU  - Yaroslav A. STELMAKH
AU  - Stanislav Lytvyn
PY  - 2026
DA  - 2026/10/26
PB  - ChemRxiv
DO  - 10.26434/chemrxiv.15011036/v1
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011036/v1
AB  - The manuscript is devoted to a comprehensive study of the physicochemical, structural and magnetic properties of Fe-NaCl nanocomposite systems with an iron content of ~30 wt.%, synthesized by the electron beam physical vapor deposition (EB PVD) method at substrate temperatures (Ts) of 50 °C and 410 °C. Using SEM, STEM/HAADF, EDS, XRD, HRTEM, TGA and Raman spectroscopy, it was proven that the thermodynamic conditions of deposition critically determine the phase composition of nanoinclusions. The transition from completely oxidized, highly hydrated agglomerates of magnetite (Fe3O4, coherent scattering region size 17 nm) at 50 °C to the formation of isolated spherical nanoparticles (15.5 - 36 nm) of the "metal core - oxide shell" type at 410 °C was recorded (Fe@Fe3O4). The appearance of a highly crystalline α-Fe core is accompanied by an increase in remanent magnetization from 0.46 to 2.3 emu/g and the saturation magnetization from 16.0 to 24.0 emu/g. The structural perfection and thermal stability of the samples obtained at 410 °C make them promising for use in magnetic devices and ideal objects for studying the spatial distribution of magnetic fields by holographic electron microscopy (Holo-TEM).
ER  -