Tailoring Magnetic Properties of Fe0.65Co0.35 Nanoparticles by Compositing with RE2O3 (RE = La, Nd, and Sm)

Fe-Co alloys are the most important soft magnetic materials, which are successfully used for a wide range of applications. In this work, the magnetic properties of lanthanide-substituted (Fe0.65Co0.35)0.95(RE2O3)0.05 (RE = La, Nd, and Sm) nanoparticles, prepared by mechanical alloying, are reported....

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Published in:Materials 2022-10, Vol.15 (20), p.7290
Main Authors: Djellal, Nacira, Pęczkowski, Paweł, Mekki, Djamel Eddine, Navarro, Elena, Tahraoui, Tarek, Piętosa, Jarosław, Michalik, Jan Marek, Marín, Pilar, Gondek, Łukasz
Format: Article
Language:English
Subjects:
Alloys
Atoms & subatomic particles
Cobalt
Cold welding
Crystallites
Ferromagnetism
Ferrous alloys
Grain boundaries
Iron
Lanthanum
Magnetic fields
Magnetic materials
Magnetic measurement
Magnetic properties
Mechanical alloying
Metals
Microstrain
Morphology
Mossbauer spectroscopy
Nanoparticles
Particle size
Samarium
Samarium base alloys
Samarium compounds
Scanning electron microscopy
Software
Substitutes
Superconducting quantum interference devices
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Summary:Fe-Co alloys are the most important soft magnetic materials, which are successfully used for a wide range of applications. In this work, the magnetic properties of lanthanide-substituted (Fe0.65Co0.35)0.95(RE2O3)0.05 (RE = La, Nd, and Sm) nanoparticles, prepared by mechanical alloying, are reported. Our comprehensive studies (X-ray diffraction, Mössbauer spectroscopy, scanning electron microscopy with X-ray energy dispersive spectrometry, SQUID magnetometry and differential scanning calorimetry) have revealed different properties, depending on the dopant type. The RE2O3 addition led to a decrease in the crystallite size and to an increase in the internal microstrain. Moreover, because of the high grain fragmentation tendency of RE2O3, the cold welding between Fe–Co ductile particles was minimized, indicating a significant decrease in the average particle size. The parent Fe0.65Co0.35 alloy is known for its soft ferromagnetism. For the La-substituted sample, the magnetic energy product was significantly lower (0.450 MG·Oe) than for the parent alloy (0.608 MG·Oe), and much higher for the Sm-substituted compound (0.710 MG·Oe). The processing route presented here, seems to be cost-effective for the large-scale production of soft magnetic materials.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15207290