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  Evolution of magnetic properties of crystalline cobalt-iron boride nanoparticles via optimization of synthesis conditions using hydrous metal chlorides

Altıntaş, Z., Khoshsima, S., Schmidt, M., Bobnar, M., Burkhardt, U., Somer, M., et al. (2021). Evolution of magnetic properties of crystalline cobalt-iron boride nanoparticles via optimization of synthesis conditions using hydrous metal chlorides. Journal of Magnetism and Magnetic Materials, 523: 167634, pp. 1-8. doi:10.1016/j.jmmm.2020.167634.

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 Creators:
Altıntaş, Zerrin1, Author
Khoshsima, Sina1, Author
Schmidt, Marcus2, Author              
Bobnar, Matej3, Author              
Burkhardt, Ulrich4, Author              
Somer, Mehmet1, Author
Balcı, Özge1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Marcus Schmidt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863415              
3Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
4Ulrich Burkhardt, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863422              

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Free keywords: Cobalt, Iron, Magnetic nanoparticles, Metal borides, Microstructure, Synthesis
 Abstract: Chemical synthesis of crystalline and nanoscale cobalt-iron metal boride powders was studied using hydrous metal chlorides and NaBH4. The effects of precursor concentration and optimized synthesis conditions on the phase formation, microstructure, and magnetic properties were investigated. After applying a reaction of CoCl2·6H2O-FeCl3·6H2O-NaBH4 at 850 °C, (CoFe)B2, (CoFe)B, Co2B, Fe3B, and Fe0.71Co0.29 boride phases were obtained from different synthesis conditions applied under autogenic pressure or Ar flow atmosphere. Oxychloride impurities were the reason for the reduced magnetization values. The highest saturation magnetization of 183 emu/g belongs to obtained nanoparticles containing (CoFe)B2 and (CoFe)B pure phases. High temperature magnetic measurements marked synthesized powders as soft magnetic materials up to 795 K while no Tc was reached for the obtained phases. © 2020 Elsevier B.V.

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Language(s): eng - English
 Dates: 2021-01-052021-01-05
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jmmm.2020.167634
 Degree: -

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Title: Journal of Magnetism and Magnetic Materials
  Other : Journal of Magnetism and Magnetic Materials: MMM
  Abbreviation : J. Magn. Magn. Mater.
Source Genre: Journal
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Publ. Info: Amsterdam : NH, Elsevier
Pages: - Volume / Issue: 523 Sequence Number: 167634 Start / End Page: 1 - 8 Identifier: ISSN: 0304-8853
CoNE: https://pure.mpg.de/cone/journals/resource/954925512464