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Title

Chemical ordering in bimetallic FeCo nanoparticles: From a direct chemical synthesis to application as efficient high-frequency magnetic material

AuthorsGarnero, Cyril; Soulantica, Katerina; Fau, Pierre; Poveda, Patrick; Lacroix, Lise-Marie; Chaudret, Bruno; Lepesant, Mathieu; Garcia-Marcelot, Cecile; Shin, Yooleemi; Meny, Christian; Fuger, Pierre; Warot-Fonrose, Bénédicte; Arenal, Raul; Viau, Guillaume
KeywordsMagnetic nanoparticles
Zero-field 58Co FNR
Mössbauer spectroscopy
Composite materials
Inductor-based filter
Issue Date2019
PublisherAmerican Chemical Society
CitationNano Letters 19(2): 1379-1386 (2019)
AbstractSingle-crystalline FeCo nanoparticles with tunable size and shape were prepared by co-decomposing two metal-amide precursors under mild conditions. The nature of the ligands introduced in this organometallic synthesis drastically affects the reactivity of the precursors and, thus, the chemical distribution within the nanoparticles. The presence of the B2 short-range order was evidenced in FeCo nanoparticles prepared in the presence of HDAHCl ligands, combining 57Fe Mössbauer, zero-field 59Co ferromagnetic nuclear resonance (FNR), and X-ray diffraction studies. This is the first time that the B2 structure is directly formed during synthesis without the need of any annealing step. The as-prepared nanoparticles exhibit magnetic properties comparable with the ones for the bulk (Ms = 226 Am2·kg¿1). Composite magnetic materials prepared from these FeCo nanoparticles led to a successful proof-of-concept of the integration on inductor-based filters (27% enhancement of the inductance value at 100 MHz).
Publisher version (URL)https://doi.org/10.1021/acs.nanolett.8b05083
URIhttp://hdl.handle.net/10261/208032
Identifiersdoi: 10.1021/acs.nanolett.8b05083
issn: 1530-6984
e-issn: 1530-6992
Appears in Collections:(ICMA) Artículos
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