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Variations in Magnetic Properties of Nanostructured Nickel

Choudhury, Paramita Kar and Banerjee, S and Ramaprabhu, S and Ramesh, KP and Menon, Reghu (2013) Variations in Magnetic Properties of Nanostructured Nickel. In: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, 13 (12). pp. 8162-8166.

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Official URL: http://dx.doi.org/10.1166/jnn.2013.7931


The magnetic properties of carbon nanotube encapsulated nickel nanowires (C. E. nanowires of diameter similar to 10 nm), and its comparison to other forms of Ni are carried out in this work. The saturation magnetization (M-s) and coercivity (H-c) for C. E. nanowires are 1.0 emu/g and 230 Oe. The temperature dependence of coercivity follows T-0.77 dependence indicating a superparamagnetic behavior. The field-cooled and zero-field-cooled plots indicate that the blocking temperature (T-B) similar to 300 K. These altered magnetic properties of C. E. nanowires are mainly due to the nanoscale confinement effect from carbon nanotube encapsulation. The shape and magnetic environment enhance the total magnetic anisotropy of C. E. nanowires by a factor of four.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to AMER SCIENTIFIC PUBLISHERS,USA
Keywords: Carbon Nanotube Encapsulation; Metallic Nanowires; Nanomagnetism; Magnetic Anisotropy
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 23 Jan 2014 05:26
Last Modified: 23 Jan 2014 05:37
URI: http://eprints.iisc.ac.in/id/eprint/48218

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