Magnetization curves of electrodeposited Ni, Fe and Co nanotubes

Paulo, Von I M; Neves-Araujo, J.; Revoredo, F. A.; Padrón-Hernández, E.

doi:10.1016/j.matlet.2018.04.025

Cited by 6 publications

(5 citation statements)

References 39 publications

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“…Cylindrical magnetic nanowires (NWs) and nanotubes are technologically promising and important nanostructures that are relevant for several applications: 3D magnetic recording, optoelectronics, sensors, actuators, spintronics (i.e., spin valves, magnetic tunnel junctions), logical devices, permanent magnets, barcode nanostructures catalysis, and bio and environmentally friendly applications (such as water purification or hyperthermia) [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. The revolution symmetry of nanowires and nanotubes makes these systems suitable for domain-wall-based technologies.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of Magnetic Properties of Large Diameter Co Nanowires and Nanotubes

et al. 2018

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A comparative study of the magnetic properties of the arrays of Co nanowires and nanotubes with large external diameters (180 nm) has been carried out. The nanowires/nanotubes were grown by electrodeposition into the self-assembled pores of anodic alumina membranes. The experimental study of their magnetic behavior was focused on the angular dependence of hysteresis loops and their parameters. In both nanowire and nanotube arrays, from the analysis of experimental data, effective longitudinal magnetic anisotropy is concluded, which is stronger in the case of the nanotube array. In addition, the extremely small remanence observed for all loops indicates the important role played by magnetostatic interactions. Micromagnetic simulations were first performed considering intrinsic shape and magnetocrystalline anisotropy terms, together with an effective easy-plane anisotropy to account for those magnetostatic interactions. A qualitative agreement between experiments and simulations is found despite the complexity introduced by the intrinsic and extrinsic array properties (i.e., large diameters, grain structure, and array configuration). In addition, simulations were also carried out for individual nanowire/nanotube with a particular emphasis to understand their differences at the remanence, due to pure geometry contribution.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of Magnetic Properties of Large Diameter Co Nanowires and Nanotubes

et al. 2018

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“…All the curves show the same trend: the coercivity increases with increasing angles and decreases sharply above a critical angle of about 45°. According to previous studies, ,,− three magnetization reversal processes have been identified in nanotube arrays: (a) coherent reversal mode (RM C ) with all the magnetic moments rotating in unison; (b) transverse reversal mode (RM T ) in which magnetic moments reverse progressively via the propagation of a transverse domain wall; and (c) vortex reversal mode (RM V ) in which magnetic moments reverse progressively via the propagation of a vortex (curling) domain wall. These reversal processes manifest in their different angle dependences of the coercivity.…”

Section: Resultsmentioning

confidence: 98%

“…Nanotubes (NTs), especially magnetic metal NTs, have been widely investigated due to their promising applications in various fields such as biomedical imaging, − high-density magnetic storage, − catalysis, − etc. Various fabrication methods have already been developed, which include the atomic layer deposition, sol–gel method, hydrothermal method, electrochemical deposition, − and so on. Among these approaches, the template-assisted electrochemical deposition technique is more attractive because of the controllable pore size and easy fabrication.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Bubble-Directed Tubular Structure: A Novel Mechanism to Facilely Synthesize Nanotube Arrays with Controllable Wall Thickness

Shen

Pan

et al. 2021

ACS Appl. Mater. Interfaces

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Nanowire arrays can be conveniently fabricated by electrodeposition methods using porous anodized alumina oxide templates. They have found applications in numerous fields. Nanotube arrays, with their hollow structure and much enhanced surface-to-volume ratio, as well as an additional tuning parameter in tube wall thickness, promise additional functions compared with nanowire arrays. Using a similar fabrication method, we have developed a facile and general method to fabricate metallic nanotubes (NTs). Using Ni NTs as a model system, the mechanism of the hydrogen-assisted NT growth was postulated and confirmed by controlling the hydrogen formation with conductive salts in an electrodeposition solution, which improves the H2 concentration but prevents the large H2 bubbles from blocking the nanochannel of a template. The controlled hydrogen generation forces the growth along the wall of nanochannels in the templates, leading to the NT formation. The magnetic properties can be controlled by the NT wall thickness, making these NTs useful for various applications.

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“…Paulo et al [58] studied the formation of metallic (Ni, Fe, Co) ferromagnetic nanotubes via chemical electrodepositing using porous polycarbonate membranes as hard-templating system. Magnetic curves were used for evaluating not only the magnetic response, but also to determine the effect of parallel/perpendicular fields with respect to saturation, remanence and coercivity.…”

Section: Magnetism and Magnetization (Hysteresis) Curvesmentioning

confidence: 99%

Magnetic Materials and Systems: Domain Structure Visualization and Other Characterization Techniques for the Application in the Materials Science and Biomedicine

2020

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Magnetic structures have attracted a great interest due to their multiple applications, from physics to biomedicine. Several techniques are currently employed to investigate magnetic characteristics and other physicochemical properties of magnetic structures. The major objective of this review is to summarize the current knowledge on the usage, advances, advantages, and disadvantages of a large number of techniques that are currently available to characterize magnetic systems. The present review, aiming at helping in the choice of the most suitable method as appropriate, is divided into three sections dedicated to characterization techniques. Firstly, the magnetism and magnetization (hysteresis) techniques are introduced. Secondly, the visualization methods of the domain structures by means of different probes are illustrated. Lastly, the characterization of magnetic nanosystems in view of possible biomedical applications is discussed, including the exploitation of magnetism in imaging for cell tracking/visualization of pathological alterations in living systems (mainly by magnetic resonance imaging, MRI).

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Magnetization curves of electrodeposited Ni, Fe and Co nanotubes

Cited by 6 publications

References 39 publications

A Comparative Study of Magnetic Properties of Large Diameter Co Nanowires and Nanotubes

A Comparative Study of Magnetic Properties of Large Diameter Co Nanowires and Nanotubes

Hydrogen Bubble-Directed Tubular Structure: A Novel Mechanism to Facilely Synthesize Nanotube Arrays with Controllable Wall Thickness

Magnetic Materials and Systems: Domain Structure Visualization and Other Characterization Techniques for the Application in the Materials Science and Biomedicine

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