Magnetic domain structure in small diameter magnetic nanowire arrays

Qin, Donghuan; Zhang, Hao‐Li; Xu, Cai-Ling; Xu, Tao; Li, Hu‐Lin

doi:10.1016/j.apsusc.2004.06.016

Cited by 14 publications

(8 citation statements)

References 16 publications

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“…With increasing temperature, the coercivity decreases as listed in Table 1. The presented system shows an analogous magnetic behavior in this low-field region as porous anodic alumina templates are filled with a ferromagnetic metal [11][12][13].…”

Section: Structural and Magnetic Characterizationsmentioning

confidence: 71%

Ferromagnetic Nanostructures Incorporated in Quasi‐One‐Dimensional Porous Silicon Channels Suitable for Magnetic Sensor Applications

Granitzer¹,

Rumpf²,

Krenn³

2006

Journal of Nanomaterials

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Mesoporous silicon structures are fabricated during an anodization process of highly doped n-type silicon in hydrofluoric acid solution. The resulting pores are oriented perpendicular to the surface and exhibit a diameter of about 50 nm and a length up to 50μm, controlled by the etching time. The growth of the pores is self-organized and depends on the crystal orientation of the used silicon wafer. The achieved channels, highly oriented along the (100) direction, are filled with nickel in a second electrochemical step. The deposition process leads to a distribution between high aspect ratio Ni-wires and Ni-particles of the incorporated metal. This achieved (porous silicon/Ni)-nanocomposite system exhibits a twofold switching behavior of the magnetization curve at two different field ranges. This property gives rise to high-magnetic field sensor applications based on a silicon technology.

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Section: Structural and Magnetic Characterizationsmentioning

confidence: 71%

Ferromagnetic Nanostructures Incorporated in Quasi‐One‐Dimensional Porous Silicon Channels Suitable for Magnetic Sensor Applications

Granitzer¹,

Rumpf²,

Krenn³

2006

Journal of Nanomaterials

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“…According to this law, if several forces act on a material point, it acquires acceleration equal to the geometric sum of accelerations which the forces would produce when acting separately. The presented model was tested while studying the process of filtration by carbon nanotubes [11][12][13][14][15][16][17][18][19].…”

Section: The Numerical Modelmentioning

confidence: 99%

Investigating permeability of porous graphene

Malozemov

2019

THERM SCI

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A graphene sheet with regular pores similar to the surface form of boron nitride is simulated be means of crystallographic constructions. The sheet is represented by the aggregate of carbon atoms in the corresponding positions of the crystal structure which do not experience thermal oscillations. Within the framework of the presented approximation, permeability of porous graphene with respect to natural gas components is theoretically analysed. Based on the results obtained, selectivity of separation for methane-helium mixtures is determined.

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“…The investigated magnetic materials comprise single metals (like Fe, Co or Ni) [11,48,51,[141][142][143][144], binary (Co-W, Co-Pt, CoNi, FeNi, etc.) [51,89,106,[144][145][146][147][148][149][150][151][152][153][154] and ternary alloys (e.g., CoNiP) [155].…”

Section: Magnetic Properties Of Nanowiresmentioning

confidence: 99%

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

Cesiulis

Tsytsaru

Podlaha

et al. 2018

CNANO

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Background: Quasi-one dimensional nanostructures: nanowires, nanotubes, nanorods, nanobelts/nanoribbons and complex "nanowire-nanoparticle" composites have been synthesized over the years. These nanostructures are particularly appealing due to their specific properties defined by their high aspect ratio: two dimensions are in the nanoscale range and one dimension is in the microscale. Methods:One of the well-designed approaches for the synthesis of such nanostructured materials is template-assisted fabrication combined with electrodeposition. The fabrication approaches for the growth of iron-group alloy nanostructures inside nanoporous oxide membranes by means of different electrodeposition techniques, and the resulting unique properties and potential applications of this type of materials are reviewed. Results:Arrays of nanostructures can be obtained by filling a porous oxide template that contains a large number of straight cylindrical, nano-sized diameter holes. Generalities of metals electrodeposition into nanoporous oxide membranes are discussed. Measures to minimize the nonuniformity of deposits inside pores need to be addressed to thin the barrier layer, to control hydrogen evolution and to improve mass transport inside the pores. Examples of binary and ternary iron group alloys grown inside nanoporous oxide templates are provided. Catalytic hydrogen evolution and methanol oxidation on the nanowires arrays are described. The "sample size effect" on the magnetic properties of materials and the electrodeposition of multilayered structures necessary for giant magnetoresistance (GMR) are discussed in details. Conclusion:Electrodeposition of binary and ternary iron-group alloys confirm that controlling alloy composition inside nanopores is still a challenge. composites [7] have been synthesized over the years. These nanostructures are particularly appealing due to their specific properties defined by their high aspect ratio: two dimensions are in the nanoscale range and one dimension is in the microscale. One of the well-designed approaches for the synthesis of such nanostructured materials is template-assisted fabrication combined with electrodeposition, first reported by Possin [8] in track etched mica films, and expanded upon by others with different materials and templates [2,[9][10][11][12][13][14]. However, the self-organized porous anodic aluminum oxide (AAO) membrane has become one of the most often used templates for tunable synthesis of different nanostructured materials [15,16].

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Magnetic domain structure in small diameter magnetic nanowire arrays

Cited by 14 publications

References 16 publications

Ferromagnetic Nanostructures Incorporated in Quasi‐One‐Dimensional Porous Silicon Channels Suitable for Magnetic Sensor Applications

Ferromagnetic Nanostructures Incorporated in Quasi‐One‐Dimensional Porous Silicon Channels Suitable for Magnetic Sensor Applications

Investigating permeability of porous graphene

Electrodeposition of Iron-Group Alloys into Nanostructured Oxide Membranes: Synthetic Challenges and Properties

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