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Magnetic properties of Aucore-Coshell nanoparticles
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Bright field TEM (a), histogram of the size of gold core (b), histogram of the size of whole particle (c), histogram of gold core to whole particle ratio (d), HRTEM (e) and its corresponding FFT (f), SAED (g) and EDX line scan with a probe size ∼ 1nm (h) and XRD θ-2θ scan (i) of Aucore-Coshell nanoparticles. The inset in (h) shows the STEM image of the particle and the direction of the EDX line scan.

Image of FIG. 2.
FIG. 2.

(Color online) The ZFC/FC curve of (a) Aucore-Coshell and (b) cobalt nanoparticles. The blocking temperatures (TB) of the two samples are the same, ∼225 K, and the inset in (b) shows the bright field TEM image of pure cobalt nanoparticles. The two possible spin configurations of the multi-grained Aucore-Coshell nanoparticles: (c) multiple domains and (d) a single domain, where the dotted lines represent grain boundaries. Magnetostatic charges and the demagnetizing field (arrow) in the single domain configuration are also shown in (d).

Image of FIG. 3.
FIG. 3.

Magnetic hysteresis loops of cobalt (a) and Aucore-Coshell (b) nanoparticles at 10 K.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic properties of Aucore-Coshell nanoparticles