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Cobalt–ferrite nanobowl arrays: Curved magnetic nanostructures

Published online by Cambridge University Press:  03 March 2011

A.K. Srivastava ,
S. Madhavi ,
T.J. White  and
R.V. Ramanujan
A.K. Srivastava
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
S. Madhavi
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
T.J. White
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
R.V. Ramanujan*
Affiliation:
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798
*
a) Address all correspondence to this author. e-mail: ramanujan@ntu.edu.sg
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Abstract

Novel magnetic cobalt ferrite nanostructures with curved surfaces (i.e., nanobowls and hollow nanospheres) in a periodic array have been fabricated by in situ reduction of a cobalt and iron salt solution mixture in the interstitial spaces of three-dimensional, close-packed, polystyrene sphere templates. The effect of the shape created by this nanostructure and magnetocrystalline anisotropy introduced by suitable annealing were used to tailor the coercivity to values relevant to high-density data-storage applications.

Keywords

Chemical synthesisMagnetic propertiesNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 5 , May 2007 , pp. 1250 - 1254
Copyright
Copyright © Materials Research Society 2007

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References

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