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Structure and magnetism of Fe–Co alloy nanoparticles

  • Metaadatok
Tartalom: http://real.mtak.hu/41133/
Archívum: MTA Könyvtár
Gyûjtemény: Status = Published

Type = Article
Cím:
Structure and magnetism of Fe–Co alloy nanoparticles
Létrehozó:
Klencsár, Zoltán
Németh, Péter
Sándor, Zoltán
Horváth, Tibor
Sajó, István E.
Mészáros, Sándor
Mantilla, J
Coaquira, J.A.H
Garg, V.K.
Kuzmann, Ernő
Tolnai, Gyula
Kiadó:
Elsevier
Dátum:
2016
Téma:
QD03 Inorganic chemistry / szervetlen kémia
Tartalmi leírás:
We report the hydrothermal synthesis and structure of FexCo1−x alloy nanoparticles with considerable stability against oxidation under ambient atmosphere. Powder X-ray diffractometry (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), inductively coupled plasma mass spectrometry (ICP-MS), 57Fe Mössbauer spectroscopy and magnetization measurements are applied to characterize the composition, morphology, crystal structure, atomic order and magnetic properties of the nanoparticles. As-prepared samples are composed mainly of the bcc FexCo1−x alloy phase. TEM images of heat-treated samples confirm the nanoparticle nature of the original alloys. A consistent analysis of the experimental results leads to x ≈ 53% and x ≈ 62% Fe atomic ratio respectively in two analogous alloy samples, and suggests that the atomic level structure of the nanoparticles corresponds to that of a fully disordered (A2-type) alloy phase. Exploration of the effect of cobalt on the 57Fe hyperfine parameters of iron microenvironments suggests that in these alloys the electronic state of Fe atoms is perturbed equally and in an additive manner by atoms in their first two coordination spheres.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Klencsár, Zoltán and Németh, Péter and Sándor, Zoltán and Horváth, Tibor and Sajó, István E. and Mészáros, Sándor and Mantilla, J and Coaquira, J.A.H and Garg, V.K. and Kuzmann, Ernő and Tolnai, Gyula (2016) Structure and magnetism of Fe–Co alloy nanoparticles. JOURNAL OF ALLOYS AND COMPOUNDS, 674. pp. 153-161. ISSN 0925-8388
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