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Energy barrier distribution for dispersed mixed oxide magnetic nanoparticles
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10.1063/1.3676229
/content/aip/journal/jap/111/7/10.1063/1.3676229
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3676229

Figures

Image of FIG. 1.
FIG. 1.

(a) Stained and (b) unstained TEM images of 5% Co-magnetoferritin. Inset shows corresponding ED with magnetite indices shown. (c) Raman spectra for magnetoferritin and 5% Co-magnetoferritin crystals. The arrows indicate the main Raman vibration modes for CoFe2O4, maghemite and magnetite.7,9 λexc is the laser wavelength used.

Image of FIG. 2.
FIG. 2.

Zero-field-cooled measurements at 100 Oe of monomers of Magnetoferritin (x = 0%) and x Co-Magnetoferritin for x = 0.5%, 1%, 2.5%, 5%, 10%, and 12.5%.

Image of FIG. 3.
FIG. 3.

Relaxation measurements of monomers of magnetoferritin (a) and x Co-magnetoferritin (b) for x = 2.5% and 5% differentiated to give an effective energy barrier distribution. Gaussian fits are represented in light gray dashed lines.

Tables

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Table I.

Compositional and magnetic data for magnetoferritin and Co-magnetoferritin.

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/content/aip/journal/jap/111/7/10.1063/1.3676229
2012-03-05
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Energy barrier distribution for dispersed mixed oxide magnetic nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3676229
10.1063/1.3676229
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