Skip to main content
SpringerLink
Log in

Cobalt–ferrite nanobowl arrays: Curved magnetic nanostructures

  • Published:
Journal of Materials Research Aims and scope Submit manuscript

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.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. M.A. Willard, L.K. Kurihara, E.E. Carpenter, S. Calvin, and V.G. Harris: Chemically prepared magnetic nanoparticles. Inter. Mater. Rev. 49, 125 (2004).

    Article  CAS  Google Scholar 

  2. T. Hyeon: Chemical synthesis of magnetic nanoparticles. Chem. Commun. 927 (2003).

    Google Scholar 

  3. C.M. Liu, L. Guo, R.M. Wang, Y. Deng, H.B. Xu, and S. Yang: Magnetic nanochains of metal formed by assembly of small nanoparticles. Chem. Commun. 2726 (2004).

    Google Scholar 

  4. V.F. Puntes, K.M. Krishnan, and P. Alivisatos: Colloidal nanocrystal shape and size control: The case of cobalt. Science 291, 2115 (2001).

    Article  CAS  Google Scholar 

  5. P.N. Bartlett, M.A. Ghanem, I.S.E Hallag, P.D. Groot, and A. Zhukov: Electrochemical deposition of macroporous magnetic networks using colloidal templates. J. Mater. Chem. 13, 2596 (2003).

    Article  CAS  Google Scholar 

  6. A.K. Srivastava, S. Madhavi, T.J. White, and R.V. Ramanujan: Template assisted assembly of cobalt nanobowl arrays. J. Mater. Chem. 15, 4424 (2005).

    Article  CAS  Google Scholar 

  7. T.C. Ulbrich, D. Makarov, G. Hu, I.L. Guhr, D. Suess, T. Schrefl, and M. Albrecht: Magnetization reversal in a novel gradient nanomaterial. Phys. Rev. Lett. 96, 077202 (2006).

    Article  CAS  Google Scholar 

  8. M. Albrecht, G. Hu, I.L. Guhr, T.C. Ulbrich, J. Boneberg, P. Leiderer, and G. Schatz: Magnetic multilayers on nanospheres. Nat. Mater. 4, 203 (2005).

    Article  CAS  Google Scholar 

  9. C.C. Berry: Possible exploitation of magnetic nanoparticles: Cell interaction for biomedical applications. J. Mater. Chem. 15, 543 (2005).

    Article  CAS  Google Scholar 

  10. Q. Liu, H. Liu, M. Han, J. Zhu, Y. Liang, Z. Xu, and Y. Song: Nanometer-sized nickel hollow spheres. Adv. Mater. 17, 1995 (2005).

    Article  CAS  Google Scholar 

  11. F. Iskandar, T. Iwaki, T. Toda, and K. Okuyama: High coercivity of ordered macroporous FePt films synthesized via colloidal templates. Nano Lett. 5, 1525 (2005).

    Article  CAS  Google Scholar 

  12. Y. Wang, Q. Zhu, and H. Zhang: Fabrication of β-Ni(OH)2 and NiO hollow spheres by a facile template-free process. Chem. Commun. 5231 (2005).

    Google Scholar 

  13. H. Daimon, O. Kitakami, O. Inagoya, and A. Sakemoto: Magnetic properties of Fe-Cu and Fe-P electrodeposited alumite films. Jpn. J. Appl. Phys. 30, 282 (1991).

    Article  CAS  Google Scholar 

  14. A.A. Zhukov, A.V. Goncharov, P.A.J. de Groot, P.N. Bartlett, and M.A. Ghanem: Magnetic antidot arrays from self-assembly template methods. J. Appl. Phys. 93, 7322 (2003).

    Article  CAS  Google Scholar 

  15. P.N. Bartlett, P.R. Birkin, and M.A. Ghanem: Electrochemical deposition of macroporous platinum, palladium and cobalt films using polystyrene latex sphere templates. Chem. Commun. 1671 (2000).

    Google Scholar 

  16. H. Yan, C.F. Blanford, W.H. Smyrl, and A. Stein: Preparation and structure of 3D ordered macroporous alloys by PMMA colloidal crystal templating. Chem. Commun. 1477 (2000).

    Google Scholar 

  17. A.K. Srivastava, S. Madhavi, T.J. White, and R.V. Ramanujan: The processing and characterization of magnetic nanobowls. Thin Solid Films 505, 93 (2006).

    Article  CAS  Google Scholar 

  18. S. Bhattacharyya, J.P. Salvetat, R. Fleurier, A. Husmann, T. Cacciaguerra, and M.L. Saboungi: One step synthesis of highly crystalline and high coercive cobalt-ferrite nanocrystals. Chem. Commun. 4818 (2005).

    Google Scholar 

  19. Q. Song and Z.J. Zhang: Shape control and associated magnetic properties of spinel cobalt ferrite nanocrystals. J. Am. Chem. Soc. 126, 6164 (2004).

    Article  CAS  Google Scholar 

  20. S. Li, V.T. John, C. O’Connor, V. Harris, and E. Carpenter: Cobalt-ferrite nanoparticles: Structure, cation distributions, and magnetic properties. J. Appl. Phys. 87, 6223 (2000).

    Article  CAS  Google Scholar 

  21. J.S. Jung, J.H. Lim, K.H. Choi, S.L. Oh, Y.R. Kim, S.H. Lee, D.A. Smith, K.L. Stokes, L. Malkinski, and C.J. O’Connor: CoFe2O4 nanostructures with high coercivity. J. Appl. Phys. 97, 10F306 (2005).

    Article  Google Scholar 

  22. H. Yoshikawa, K. Hayashida, Y. Kozuka, A. Horiguchi, K. Awaga, S. Bandow, and S. Iijima: Preparation and magnetic properties of hollow nano-spheres of cobalt and cobalt oxide: Drastic cooling-field effects on remnant magnetization of antiferromagnet. Appl. Phys. Lett. 85, 5287 (2004).

    Article  CAS  Google Scholar 

  23. S. Li, L. Liu, V.T. John, C.J. O’Connor, and V.G. Harris: Cobalt–ferrite nanoparticles: correlations between synthesis procedures, structural characteristics and magnetic properties. IEEE Trans. Magn. 37, 2350 (2001).

    Article  CAS  Google Scholar 

  24. Y. Wang, Q. Zhu, and H. Zhang: Fabrication and magnetic properties of hierarchical porous hollow nickel microspheres. J. Mater. Chem. 16, 1212 (2006).

    Article  CAS  Google Scholar 

  25. G. Duan, W. Cai, Y. Li, Z. Li, B. Cao, and Y. Luo: Transferable ordered Ni hollow sphere arrays induced by electrodeposition on colloidal monolayer. J. Phys. Chem. B 110, 7184 (2006).

    Article  CAS  Google Scholar 

  26. S.P. Li, W.S. Lew, Y.B. Xu, A. Hirohata, A. Samad, F. Baker, and J.A.C Bland: Magnetic nanoscale dots on colloid crystal surfaces. Appl. Phys. Lett. 76, 748 (2000).

    Article  CAS  Google Scholar 

  27. R. Skomski: Domain-wall curvature and coercivity in pinning type Sm–Co magnets. J. Appl. Phys. 81, 5627 (1997).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798

    A. K. Srivastava, S. Madhavi, T. J. White & R. V. Ramanujan

Authors
  1. A. K. Srivastava
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. Madhavi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. T. J. White
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. R. V. Ramanujan
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to R. V. Ramanujan.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Srivastava, A.K., Madhavi, S., White, T.J. et al. Cobalt–ferrite nanobowl arrays: Curved magnetic nanostructures. Journal of Materials Research 22, 1250–1254 (2007). https://doi.org/10.1557/jmr.2007.0149

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1557/jmr.2007.0149

Search

Navigation