Effect of size distribution on magnetic properties in cobalt nanowires

Magnetic nickel nanoparticles are prepared by NaBH4reducing agent in AOT reverse microemulsion, the influence of water content on the morphology and magnetic properties of nickel nanoparticles are investigated by TEM study, size distribution, XRD characterization and magnetization curves. The results show that spherical and polydispered particles are obtained in microemulsion. The dimension and polydispersity of particles increased with the increasing of water content. Magnetization curves clearly indicate a ferromagnetic behavior with high coercivity values. At water content of W0=41.7, the product has a high saturated magnetization 70.68 emu/g with its residual magnetizations 28.02 emu/g, higher than the sample obtained at water content of W0=13.9.

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Magnetic Properties of Co/CoO Core–Shell Nanowires: Roles of Antiferromagnetic Grain Size Distribution and Interfacial Spin Glass

IEEE Transactions on Magnetics ◽

10.1109/tmag.2018.2833390 ◽

2018 ◽

Vol 54 (11) ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

X. Wen ◽

K. Gandha ◽

J. P. Liu ◽

W. Y. Yang ◽

C. S. Wang ◽

...

Keyword(s):

Grain Size ◽

Magnetic Properties ◽

Spin Glass ◽

Size Distribution ◽

Grain Size Distribution ◽

Core Shell ◽

Shell Nanowires

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Study on Properties of Ultrasonication Treated Pulp Fiber

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.633-634.451 ◽

2014 ◽

Vol 633-634 ◽

pp. 451-454

Author(s):

Quan Xiao Liu ◽

Dan Xi Li

Keyword(s):

Magnetic Properties ◽

Specific Surface ◽

Pore Size Distribution ◽

Pore Size ◽

Size Distribution ◽

Surface Area ◽

Specific Surface Area ◽

Ash Content ◽

Pulp Fiber ◽

Treated Fiber

SEM and Automated Surface Area & Pore Size Analyzer were used to characterize surface morphology and specific surface area and the pore size distribution of fibers. The results showed that specific surface area and pore size distribution increase after ultrasonication. The ash content of the composites of ultrasonic treated fiber is larger than the untreated fiber, and the magnetic properties show a good superparamagnetic behavior.

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Dependence of the magnetic properties of Zn bonded Sm/sub 2/Fe/sub 17/N/sub x/ magnets on the particle size distribution

IEEE Transactions on Magnetics ◽

10.1109/20.312373 ◽

1994 ◽

Vol 30 (2) ◽

pp. 675-677 ◽

Cited By ~ 6

Author(s):

B. Wall ◽

M. Katter ◽

W. Rodewald ◽

M. Velicescu

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Particle Size Distribution ◽

Size Distribution

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Influence of particle size distribution on magnetic properties of nanocrystalline soft magnetic Fe/sub 80/Zr/sub 7/Cu/sub 1/B/sub 6/

INTERMAG 2000 Digest of Technical Papers. 2000 IEEE International Magnetics Conference ◽

10.1109/intmag.2000.871899 ◽

2005 ◽

Author(s):

F.C.S. da Silva ◽

M. Knobel ◽

D. Ugarte ◽

D. Zanchet

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Particle Size Distribution ◽

Size Distribution ◽

Soft Magnetic

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Scalable Production of Carbon Encapsulated Ni Nanoparticles by Water Arc Discharge: Structural and Magnetic Properties

Journal of Metastable and Nanocrystalline Materials ◽

10.4028/www.scientific.net/jmnm.23.87 ◽

2005 ◽

Vol 23 ◽

pp. 87-90 ◽

Cited By ~ 1

Author(s):

K.H. Ang ◽

I. Alexandrou ◽

N.D. Mathur ◽

R. Lacerda ◽

I.Y.Y. Bu ◽

...

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Particle Size Distribution ◽

Size Distribution ◽

Arc Discharge ◽

Narrow Particle Size Distribution ◽

Ni Nanoparticles ◽

X Ray Diffraction ◽

Transmission Electron ◽

Water Container

An electric arc discharge in de-ionised water between a solid graphite cathode and an anode made by compressing Ni and C containing powders in a mass ratio of Ni:C = 7:3 was used here to prepare carbon encapsulated Ni nanoparticles in the form of powder suspended in water. The morphology of the produced material was analysed using high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The magnetic properties of the samples were determined using a Princeton vibrating sample magnetometer (VSM). Collection of the powder produced from different depths in the water container has proved to be an effective method for obtaining samples with narrow particle size distribution. Further material purification by dry NH4 plasma etching was used to remove the amorphous carbon content of the samples. XRD and HRTEM analysis showed that the material synthesized is fcc Ni particles with mean particle size ranging from 14 to 30 nm encapsulated in 2 to 5 graphitic cages. The data suggests that the process reported has the ability to mass-produce carbon encapsulated ferromagnetic nanoparticles with desired particle size distribution, and hence with controlled size-dependent magnetic properties.

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