Skip to main content
SpringerLink
Log in

AC-Susceptibility Measurements of the Superparamagnetic Relaxation in Systems of Ni1−xZnxFe2O4 Nanoparticles

  • Published:
MRS Online Proceedings Library Aims and scope

Abstract

We have investigated the effect of Zn-doping on the superparamagnetic relaxation of nanosized nickel ferrite particles. Our temperature-resolved AC-susceptibility data demonstrate that the relaxation of these systems is well described by an Arrhenius-type law, behavior which allows a precise determination of the effective energy barrier to magnetization reversal, Ueff. We observe that the Zn-content dependence of Ueff exhibits a pronounced maximum when half on the magnetic Ni2+ ions are replaced by nonmagnetic Zn2+. The average blocking temperature (measured at a given frequency) shows a similar behavior. The observed increase of Ueff is attributed to an enhanced magnetic anisotropy induced by the crossover between two magnetocrystalline regimes. Our findings demonstrate the ability to control the superparamagnetic relaxation of ferrimagnetic spinel nanoparticles through chemical manipulations.

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. L. Néel, Ann. Geophys. (C.N.R.S.) 5, 99 (1949).

    Google Scholar 

  2. Y. D. Zhang, J. I. Budnick, W. A. Hines, C. L. Chen, and J. Q. Xiao, Appl. Phys. Lett. 72, 2053 (1998).

    Article  CAS  Google Scholar 

  3. W. Luo, S. R. Nagel, T. F. Rosenbaum, and R. E. Rosenweig, Phys. Rev. Lett. 67, 2721 (1991).

    Article  CAS  Google Scholar 

  4. M. Hanson, C. Johansson, and S Mørup, Phys. Rev. Lett 81, 735 (1998).

    Article  CAS  Google Scholar 

  5. F. Luis, E. del Barco, J. M. Hernandez, E. Remiro, J. Bartolomé, and J. Tejada, Phys. Rev. B. 59, 11837 (1999).

    Article  CAS  Google Scholar 

  6. F. Luis, E. del Barco, J. M. Hernandez, E. Remiro, J. Bartolome, and J. Tejada, Phys. Rev. B 59, 11837 (1999).

    Article  CAS  Google Scholar 

  7. E. W. Gorter, Nature 165, 798 (1950).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Physics, University of Texas at El Paso, 79968, El Paso, TX, USA

    Antony Adair, Jose T. Elizalde Galindo & Cristian Botez

  2. Centro de Investigación en Materials Avanzados, Chihuahua, Mexico

    Verónica Corral Flores, Dario Bueno Baques, Luis Fuentes Cobas & José A. Matutes-Aquino

Authors
  1. Antony Adair
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Jose T. Elizalde Galindo
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Cristian Botez
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Verónica Corral Flores
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Dario Bueno Baques
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Luis Fuentes Cobas
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. José A. Matutes-Aquino
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Adair, A., Galindo, J.T.E., Botez, C. et al. AC-Susceptibility Measurements of the Superparamagnetic Relaxation in Systems of Ni1−xZnxFe2O4 Nanoparticles. MRS Online Proceedings Library 962, 1018 (2006). https://doi.org/10.1557/PROC-0962-P10-18

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1557/PROC-0962-P10-18

Search

Navigation