Synthesis of monodisperse CoPt nanoparticles: Structural and magnetic properties

Kaya, Doğan; Adanur, İdris; Akyol, Mustafa; Karadağ, Faruk; Ekicibil, Ahmet

doi:10.1016/j.molstruc.2020.128999

Cited by 10 publications

(1 citation statement)

References 37 publications

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“…Among the most promising are bimetallic nanostructured Fe-Pt, Co-Pt, Fe-Pd, and Co-Pd systems. The works [2][3][4][5][6] reflect the uniqueness of the calculated (predicted) magnetic properties of the Fe, Co-Pt, and Pd intermetallic nanoalloys with compositions close to equiatomic and highly ordered L10 structure obtained by heat treatment of the above bimetallic nanoalloys. Their magnetic (coercivity up to 70 kOe, saturation magnetization up to 100 emu/g) and magnetooptical properties are record-breaking for bimetallic alloys.…”

Section: Introductionmentioning

confidence: 75%

Synthesis and study of some physicochemical features of Co-Pt nanostructured system

Zakharov,

Tikhonova,

Popova

et al. 2024

BIO Web Conf.

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In the work by methods of XRD, TEM, SAED, XPS combined with mass-spectrometry of gaseous products, SAXS, and elemental analysis of samples the phase compositions and morphology of particles of nanostructured Co-Pt system synthesized by the method of reduction of hydrazine-hydrate aqueous solutions of precursors were studied (in the region rich in Pt for the first time). It was found that in the composition range up to ≈ 60 at. % Co. XRD-analysis of synthesized samples fixes as the only FCC phase of solid solution of Co in Pt, with the established upper limit of solubility %18±1 at. At the content of Co above the limit, along with it, the X-ray diffraction unregistered phases with the content of Co above the limit in solid solution are also formed. Their presence was confirmed by the SAXS method, and their metallic nature (not oxide-hydroxide) nature follows from the results of XRD, SAED. When FCC phase formed metal reduction process proceeded directly without cobalt hydroxides forming. According to results of XPS with the Ar-etching of samples there were internal platinum-rich sub-regions in Co-Pt nanoalloys.

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