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An aerosol-mediated magnetic colloid: Study of nickel nanoparticles
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10.1063/1.2033145
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    Affiliations:
    1 Department of Chemistry, The University at Buffalo, The State University of New York, Buffalo, New York 14260 and Institute for Lasers, Photonics and Biophotonics, The University at Buffalo, The State University of New York, Buffalo, New York 14260
    2 Department of Chemical and Biological Engineering, The University at Buffalo, The State University of New York, Buffalo, New York 14260 and Institute for Lasers, Photonics and Biophotonics, The University at Buffalo, The State University of New York, Buffalo, New York 14260
    3 Department of Physics, The University at Buffalo, The State University of New York, Buffalo, New York 14260
    4 Department of Physics, The University at Buffalo, The State University of New York, Buffalo, New York 14260 and Institute for Lasers, Photonics and Biophotonics, The University at Buffalo, The State University of New York, Buffalo, New York 14260
    5 Institute for Lasers, Photonics and Biophotonics, The University at Buffalo, The State University of New York, Buffalo, New York 14260
    6 Department of Chemistry, The University at Buffalo, The State University of New York, Buffalo, New York 14260, Department of Physics, The University at Buffalo, The State University of New York, Buffalo, New York 14260, and Institute for Lasers, Photonics and Biophotonics, The University at Buffalo, The State University of New York, Buffalo, New York 14260
    a) Electronic mail: pnprasad@buffalo.edu
    J. Appl. Phys. 98, 054308 (2005); http://dx.doi.org/10.1063/1.2033145
/content/aip/journal/jap/98/5/10.1063/1.2033145
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/5/10.1063/1.2033145
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) TEM image of nickel particles deposited from a toluene dispersion, (b) HRTEM image showing lattice fringes of a single particle, and (c) electron-diffraction pattern from a selected area on the TEM grid.

Image of FIG. 2.
FIG. 2.

(Color online) AFM picture of Ni particles drop cast from a pyridine dispersion onto a silicon wafer.

Image of FIG. 3.
FIG. 3.

XRD pattern of nickel nanoparticle powder. No phases other than metallic nickel are apparent from the diffractogram.

Image of FIG. 4.
FIG. 4.

EDS spectrum of nickel powder.

Image of FIG. 5.
FIG. 5.

Magnetization of nickel nanoparticles: (a) low-temperature results showing magnetic hysteresis, (b) higher-temperature results showing superparamagnetic behavior above 200 K, and (c) Langevin function fit of the magnetization curve at 300 K. The normalized plot in (b) shows the expected scaling behavior.

Image of FIG. 6.
FIG. 6.

ZFC and FC magnetization curves for nickel nanoparticles. The onset of divergence occurs at indicating spin blocking.

Image of FIG. 7.
FIG. 7.

Shifting of the broad maximum in the blocking curve with the applied field magnitude.

Image of FIG. 8.
FIG. 8.

The coercive field approximately scales as at low temperatures.

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/content/aip/journal/jap/98/5/10.1063/1.2033145
2005-09-07
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An aerosol-mediated magnetic colloid: Study of nickel nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/5/10.1063/1.2033145
10.1063/1.2033145
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