NANO-STRUCTURED Nd-Fe-B THIN FILMS DEPOSITED ON GLASS SUBSTRATE BY FLASH EVAPORATION METHOD

Authors

  • Ana-Maria POPESCU Laboratory of Electrochemistry and Corrosion, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Bucharest, Romania. Corresponding author: popescuamj@yahoo.com
  • Mihai ANASTASESCU Laboratory of Electrochemistry and Corrosion, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Bucharest, Romania. https://orcid.org/0000-0002-4865-2652
  • Jose CALDERON MORENO Laboratory of Electrochemistry and Corrosion, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Bucharest, Romania. https://orcid.org/0000-0001-8376-9082
  • Elena Ionela NEACSU Laboratory of Electrochemistry and Corrosion, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Bucharest, Romania. https://orcid.org/0000-0002-8054-0597
  • Olga DEMIDENKO MINCHUKOVA Scientific-Practical Materials Research Center (NAS), Minsk, Belarus
  • Kazimir YANUSHKEVICH (†) Scientific-Practical Materials Research Center (NAS), Minsk, Belarus
  • Virgil CONSTANTIN Laboratory of Electrochemistry and Corrosion, “Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Bucharest, Romania. Corresponding author: virgilconstantin@yahoo.com https://orcid.org/0000-0002-5076-9489

DOI:

https://doi.org/10.24193/subbchem.2025.3.05

Keywords:

nanostructured thin film, NdFeB thin films, microstructure, characterization of thin films, thin film surface analysis, nanomagnetic properties of NdFeB thin films

Abstract

Nd-Fe-B nanostructured thin layers have been growth on the glass substrate by the "flash" evaporation (FE) method. The microscopic and surface structure analysis of the Nd-Fe-B thin films investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) demonstrate these thin films to be nanostructured.The temperature dependence of the specific magnetization of the films in the 80 ≤ T ≤ 800 K range, measured by the ponderomotive method showed that the magnetization of the Nd-Fe-B nanostructured thin films before corrosion did not exceed 85 A×m2×kg-1 at 77 K. In such Nd-Fe-B nano thin films the long-range structural order is destroyed. After corrosive action on the thin films, their specific magnetization value increased to 140-155 A×m2×kg-1, most probably because of the formation of Fe3O4 (iron oxide) and the presence of free iron ions on the surface of the nanometric Nd-Fe-B layer upon heating the samples to 1050 K. XPS spectra confirmed the presence of Fe3O4, FeOOH and Nd(OH)3.

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STUDIA UBB CHEMIA, Volume 70 (LXX), No. 3, September 2025

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Published

2025-09-24

How to Cite

POPESCU, A.-M., ANASTASESCU, M., CALDERON MORENO, J., NEACSU, E. I., DEMIDENKO MINCHUKOVA, O., YANUSHKEVICH, K., & CONSTANTIN, V. (2025). NANO-STRUCTURED Nd-Fe-B THIN FILMS DEPOSITED ON GLASS SUBSTRATE BY FLASH EVAPORATION METHOD. Studia Universitatis Babeș-Bolyai Chemia, 70(3), 65–84. https://doi.org/10.24193/subbchem.2025.3.05

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Volume 70, No. 3, 2025

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