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Synthesis and magnetic characterization of Co-NiO-Ni core-shell nanotube arrays
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10.1063/1.3646491
/content/aip/journal/jap/110/7/10.1063/1.3646491
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/7/10.1063/1.3646491
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) Schematics of the fabrication process of Co-NiO-Ni core-shell nanotube arrays; (a) AAO template; (b) Ni nanotubes; (c) Ni-NiO nanotubes; (d)-(f) Co-NiO-Ni core-shell nanotube.

Image of FIG. 2.
FIG. 2.

SEM and TEM image of as-grown Ni nanotube prepared by the AAO template; (a) Ni nanotube arrays; (b) and (c) a single Ni nanotube with the outer diameter about 200 nm; (d) high resolution TEM image of as-prepared Ni nanotubes. The inset of (d) is a SAED image.

Image of FIG. 3.
FIG. 3.

(Color online) EDS analysis of the Co-NiO-Ni core-shell nanotubes. (a) TEM images of core-shell nanotubes. (b) EDS line profiles for the core-shell nanotube from to in panel (a). (c) SEM images of core-shell nanotubes. (d) EDS line scanning of core-shell nanotubes in panel (c). (e) and (f) EDS spectrums of Ni nanotubes and Co-NiO-Ni core-shell nanotubes.

Image of FIG. 4.
FIG. 4.

(Color online) Typical magnetic hysteresis loops of (a) Ni and (b) Co-NiO-Ni core-shell nanotube arrays. (c) Angular dependent coercivity () of Ni and Co-NiO-Ni core-shell nanotube arrays, where represents the angle between the applied magnetic field and the nanotube axis.

Image of FIG. 5.
FIG. 5.

(Color online) Magnetic hysteresis loops of (a) Ni nanotubes and (b) Co-NiO-Ni core-shell nanotubes at 5 K and 300 K. The insets of (a) and (b) show the corresponding enlarged () loops.

Image of FIG. 6.
FIG. 6.

(Color online) M-T curves for the (a) Ni nanotubes and (b) Co-NiO-Ni core-shell nanotubes under ZFC and FC (H = 100 Oe) conditions.

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/content/aip/journal/jap/110/7/10.1063/1.3646491
2011-10-12
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Synthesis and magnetic characterization of Co-NiO-Ni core-shell nanotube arrays
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/7/10.1063/1.3646491
10.1063/1.3646491
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