Controllable synthesis of ferromagnetic–antiferromagnetic core–shell NWs with tunable magnetic properties

Wang, C. J.; Li, W. J.; Zhang, X. M.; Kong, Wenwen; Liu, Peng; Wan, Caihua; Liu, Y. W.; Han, Xiufeng

doi:10.1039/c7nr01471f

Cited by 18 publications

(15 citation statements)

References 40 publications

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“…A very useful technique to fabricate nanowire arrays is electrochemical deposition inside nanoporous membranes [14–20]. Some of the advantages of this method are low cost, high reproducibility and fabrication at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Magnetism and magnetoresistance of single Ni–Cu alloy nanowires

Costas¹,

Florica²,

Matei³

et al. 2018

Beilstein J. Nanotechnol.

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Arrays of magnetic Ni–Cu alloy nanowires with different compositions were prepared by a template-replication technique using electrochemical deposition into polycarbonate nanoporous membranes. Photolithography was employed for obtaining interdigitated metallic electrode systems of Ti/Au onto SiO2/Si substrates and subsequent electron beam lithography was used for contacting single nanowires in order to investigate their galvano-magnetic properties. The results of the magnetoresistance measurements made on single Ni–Cu alloy nanowires of different compositions have been reported and discussed in detail. A direct methodology for transforming the magnetoresistance data into the corresponding magnetic hysteresis loops was proposed, opening new possibilities for an easy magnetic investigation of single magnetic nanowires in the peculiar cases of Stoner–Wohlfarth-like magnetization reversal mechanisms. The magnetic parameters of single Ni–Cu nanowires of different Ni content have been estimated and discussed by the interpretation of the as derived magnetic hysteresis loops via micromagnetic modeling. It has been theoretically proven that the proposed methodology can be applied over a large range of nanowire diameters if the measurement geometry is suitably chosen.

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Section: Introductionmentioning

confidence: 99%

Magnetism and magnetoresistance of single Ni–Cu alloy nanowires

Costas¹,

Florica²,

Matei³

et al. 2018

Beilstein J. Nanotechnol.

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“…Sol-gel and electrochemical deposition FeTiO 3 (antiferromagnetic shell) + Ni or Ni 80 Fe 20 core (Khan et al 2016); BiFe 0.95 Co 0.05 O 3 (multiferroic shell) + permalloy core (Javed et al 2015); Cr 2 O 3 (antiferromagnetic shell) + Ni or Fe core (Irfan et al 2017).…”

Section: Core-shell Structuresmentioning

confidence: 99%

Magnetic Nanowires and Nanotubes

Staňo

Fruchart

2018

Handbook of Magnetic Materials

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We propose a review of the current knowledge about the synthesis, magnetic properties and applications of magnetic cylindrical nanowires and nanotubes. By nano we consider diameters reasonably smaller than a micrometer. At this scale, comparable to micromagnetic and transport length scales, novel properties appear. At the same time, this makes the underlying physics easier to understand due to the limiter number of degrees of freedom involved. The three-dimensional nature and the curvature of these objects contribute also to their specific properties, compared to patterns flat elements. While the topic of nanowires and later nanotubes started now decades ago, it is nevertheless flourishing, thanks to the progress of synthesis, theory and characterization tools. These give access to ever more complex and thus functional structures, and also shifting the focus from material-type measurements of large assemblies, to single-object investigations. We first provide an overview of common fabrication methods yielding nanowires, nanotubes and structures engineered in geometry (change in diameter, shape) or material (segments, core-shell structures), shape or core-shell. We then review their magnetic properties: global measurements, magnetization states and switching, single domain wall statics and dynamics, and spin waves. For each aspect, both theory and experiments are surveyed. We also mention standard characterization techniques useful for these. We finally mention emerging applications of magnetic nanowires and nanotubes, along with the foreseen perspectives in the topic.

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“…Cylindrical coaxial nanostructures can exhibit novel phenomena due to their unique size- and shape-dependent physico-chemical properties, as compared to their bulk counterparts, making them enormously attractive as innovative multifunctional materials, for both fundamental and technological applications, such as photonics, drug delivery, and cell separation for proteomics research, hierarchical core/shell heterostructured electrodes for high-performance Li-ion batteries, or highly anisotropic ferromagnetic-antiferromagnetic core/shell nanomaterials exhibiting tunable magnetic properties [ 1 , 2 , 3 , 4 ]. These peculiar, elongated hybrid nanostructures are coaxially combining two or more components with several phases of distinct properties that could originate additional effects compared with single-phase nanomaterials, which outfit them with enhanced multifunctional properties.…”

Section: Introductionmentioning

confidence: 99%

Magnetization Reversal Process and Magnetostatic Interactions in Fe56Co44/SiO2/Fe3O4 Core/Shell Ferromagnetic Nanowires with Non-Magnetic Interlayer

et al. 2021

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Nowadays, numerous works regarding nanowires or nanotubes are being published, studying different combinations of materials or geometries with single or multiple layers. However, works, where both nanotube and nanowires are forming complex structures, are scarcer due to the underlying difficulties that their fabrication and characterization entail. Among the specific applications for these nanostructures that can be used in sensing or high-density magnetic data storage devices, there are the fields of photonics or spintronics. To achieve further improvements in these research fields, a complete understanding of the magnetic properties exhibited by these nanostructures is needed, including their magnetization reversal processes and control of the magnetic domain walls. In order to gain a deeper insight into this topic, complex systems are being fabricated by altering their dimensions or composition. In this work, a successful process flow for the additive fabrication of core/shell nanowires arrays is developed. The core/shell nanostructures fabricated here consist of a magnetic nanowire nucleus (Fe56Co44), grown by electrodeposition and coated by a non-magnetic SiO2 layer coaxially surrounded by a magnetic Fe3O4 nanotubular coating both fabricated by means of the Atomic Layer Deposition (ALD) technique. Moreover, the magnetization reversal processes of these coaxial nanostructures and the magnetostatic interactions between the two magnetic components are investigated by means of standard magnetometry and First Order Reversal Curve methodology. From this study, a two-step magnetization reversal of the core/shell bimagnetic nanostructure is inferred, which is also corroborated by the hysteresis loops of individual core/shell nanostructures measured by Kerr effect-based magnetometer.

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Controllable synthesis of ferromagnetic–antiferromagnetic core–shell NWs with tunable magnetic properties

Cited by 18 publications

References 40 publications

Magnetism and magnetoresistance of single Ni–Cu alloy nanowires

Magnetism and magnetoresistance of single Ni–Cu alloy nanowires

Magnetic Nanowires and Nanotubes

Magnetization Reversal Process and Magnetostatic Interactions in Fe56Co44/SiO2/Fe3O4 Core/Shell Ferromagnetic Nanowires with Non-Magnetic Interlayer

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