Facile route to preparation of Fe-Co microclusters with highly enhanced magnetic performances

Zhou, Xing; Liu, Shou-Qing; Xu, Nan; Wu, Zhengying; Huang, Junnan

doi:10.1016/j.matlet.2014.08.093

Cited by 2 publications

(1 citation statement)

References 27 publications

(25 reference statements)

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“…There are many reports in the literature related to the synthesis of NW arrays based on transition metals alloys [8,9]. Among these, those based on cobalt and iron (CoFe x ) have received special attention due to their remarkable magnetic properties, such as high Curie temperature, high saturation magnetization, and large uniaxial shape anisotropy [10][11][12]. Such properties grant them a wide range of potential applications, including data storage and medical imaging [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

et al. 2017

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A straightforward method for the synthesis of CoFe/CoFeO core/shell nanowires is described. The proposed method starts with a conventional pulsed electrodeposition procedure on alumina nanoporous template. The obtained CoFe nanowires are released from the template and allowed to oxidize at room conditions over several weeks. The effects of partial oxidation on the structural and magnetic properties were studied by x-ray spectrometry, magnetometry, and scanning and transmission electron microscopy. The results indicate that the final nanowires are composed of 5 nm iron-cobalt alloy nanoparticles. Releasing the nanowires at room conditions promoted surface oxidation of the nanoparticles and created a CoFeO shell spinel-like structure. The shell avoids internal oxidation and promotes the formation of bi-magnetic soft/hard magnetic core/shell nanowires. The magnetic properties of both the initial single-phase CoFe nanowires and the final core/shell nanowires, reveal that the changes in the properties from the array are due to the oxidation more than effects associated with released processes (disorder and agglomeration).

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Section: Introductionmentioning

confidence: 99%

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

et al. 2017

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Structure and magnetism of Fe–Co alloy nanoparticles

Klencsár

Németh

Zoltán

et al. 2016

Journal of Alloys and Compounds

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We report the hydrothermal synthesis and structure of Fe x Co 1-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), 57 FeMössbauer 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 Fe x Co 1-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 57 Fe 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.

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Facile route to preparation of Fe-Co microclusters with highly enhanced magnetic performances

Cited by 2 publications

References 27 publications

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

Synthesis and magnetic properties of cobalt-iron/cobalt-ferrite soft/hard magnetic core/shell nanowires

Structure and magnetism of Fe–Co alloy nanoparticles

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