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

Altıntaş, Zerrin; Khoshsima, Sina; Schmidt, Marcus; Bobnar, Matej; Burkhardt, Ulrich; Somer, M.; Balcı, Özge

doi:10.1016/j.jmmm.2020.167634

Cited by 6 publications

(2 citation statements)

References 48 publications

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“…This, in turn, encounters the problems with interpretation of the XRD, TMS, and magnetic results obtained for those samples. It should be also mentioned that the formation of boride has been already reported for the Co nanoparticles [ 44 , 45 ], the Fe nanoparticles [ 46 , 47 ], as well as the Fe-Co nanoparticles [ 26 , 48 ].…”

Section: Discussionmentioning

confidence: 96%

Evolution of Structural and Magnetic Properties of Fe-Co Wire-like Nanochains Caused by Annealing Atmosphere

et al. 2021

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Thermal treatment is a post-synthesis treatment that aims to improve the crystallinity and interrelated physical properties of as-prepared materials. This process may also cause some unwanted changes in materials like their oxidation or contamination. In this work, we present the post-synthesis annealing treatments of the amorphous Fe1−xCox (x = 0.25; 0.50; 0.75) Wire-like nanochains performed at 400 °C in two different atmospheres, i.e., a mixture of 80% nitrogen and 20% hydrogen and argon. These processes caused significantly different changes of structural and magnetic properties of the initially-formed Fe-Co nanostructures. All of them crystallized and their cores were composed of body-centered cubic Fe-Co phase, whereas their oxide shells comprised of a mixture of CoFe2O4 and Fe3O4 phases. However, the annealing carried out in hydrogen-containing atmosphere caused a decomposition of the initial oxide shell layer, whereas a similar process in argon led to its slight thickening. Moreover, it was found that the cores of thermally-treated Fe0.25Co0.75 nanochains contained the hexagonal closest packed (hcp) Co phase and were covered by the nanosheet-like shell layer in the case of annealing performed in argon. Considering the evolution of magnetic properties induced by structural changes, it was observed that the coercivities of annealed Fe-Co nanochains increased in comparison with their non-annealed counterparts. The saturation magnetization (MS) of the Fe0.25Co0.75 nanomaterial annealed in both atmospheres was higher than that for the non-annealed sample. In turn, the MS of the Fe0.75Co0.25 and Fe0.50Co0.50 nanochains annealed in argon were lower than those recorded for non-annealed samples due to their partial oxidation during thermal processing.

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Section: Discussionmentioning

confidence: 96%

Evolution of Structural and Magnetic Properties of Fe-Co Wire-like Nanochains Caused by Annealing Atmosphere

et al. 2021

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“…FeB showed an exchange bias of up to 270 Oe at room temperature and coercivity enhancement of up to 400 Oe. Balcı and co-workers studied the magnetic properties of nanocrystalline cobalt–iron–boride. They found a high magnetization saturation value of 183 emu/g and 146 emu/g for the (CoFe)B 2 /CoFeB and Co 2 B/Fe 3 B, respectively.…”

Section: Metal Borides For Heterogeneous Catalysismentioning

confidence: 99%

Metal Borides: From Industrial Classics to Versatile Colloidal Nanocrystals for Energy, Catalysis, and Hard Coatings Applications

Hong,

Mutalik,

Pescarmona

et al. 2024

Chem. Mater.

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Metal boride (M x B y ) nanocrystals (NCs) represent a cutting-edge and promising materials class that has gained significant attention in nanotechnology and materials science. The distinct combination of metal and boron at the nanoscale imparts exceptional mechanical, electronic, and thermal characteristics to these materials, making them highly desirable for various technological applications. M x B y NCs exhibit remarkable hardness, thermal stability, and resistance to wear, rendering them suitable for applications in high-performance materials, coatings, and cutting-edge electronic devices. The nanoscale size of these crystals further enhances their reactivity, properties, and surface area, opening up new possibilities for catalytic processes and energyrelated applications. Researchers are actively exploring various methods of synthesizing these materials, their structural properties, and potential applications, aiming to unlock their full potential for innovations in diverse fields ranging from materials engineering to energy storage. This perspective sets the stage for a deeper exploration into the fascinating world of metal boride NCs and their transformative impact on various technological frontiers.

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Synthesis of oleic acid – coated zinc – doped iron boride nanoparticles for biomedical applications

Paksoy,

Aydemir,

Somer

et al. 2024

Ceramics International

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

Cited by 6 publications

References 48 publications

Evolution of Structural and Magnetic Properties of Fe-Co Wire-like Nanochains Caused by Annealing Atmosphere

Evolution of Structural and Magnetic Properties of Fe-Co Wire-like Nanochains Caused by Annealing Atmosphere

Metal Borides: From Industrial Classics to Versatile Colloidal Nanocrystals for Energy, Catalysis, and Hard Coatings Applications

Synthesis of oleic acid – coated zinc – doped iron boride nanoparticles for biomedical applications

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