Skip to main content
SpringerLink
Log in

Mössbauer investigations of γ-Fe2O3 particles

  • Magnetism and Magnetic Materials
  • Published:
Hyperfine Interactions Aims and scope Submit manuscript

Abstract

Microcrystals of γ-Fe2O3 powder in the size range of single domain particles showing broadened six-line patterns at room temperature in zero applied field were found to behave purely superferromagnetic without any superparamagnetic portion. The broadened patterns have been interpreted on the basis of independent-uniaxial particles with unequal magnetization direction probability which undergo relaxation.

Addition of alkaline, dotation with Zn2+ ions and coating by SiO2 cause further line broadening due to relaxation phenomena. The application of a magnetic field did not narrow the line width. This is taken as evidence for incomplete orientation of the magnetization vectors along the direction of the magnetic field. The microcrystals are assumed to subdivide in subdomains which probably possess a size distribution.

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. S. Mørup, in:Mössbauer Spectroscopy Applied to Inorganic Chemistry, ed. G.J. Long, Vol. 2 (Plenum Press, New York and London, 1988 p. 89.

    Google Scholar 

  2. DDR-WB, C 09/2391 184.

  3. D.G. Rancourt and J.M. Daniels, Phys. Rev. B. 29 (1984) 2410.

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Central Institute of Physical Chemistry, Academy of Sciences of GDR, DDR-1199, Berlin-Adlershof

    H. Mehner

  2. VEB Magnetbandfabrik Dessau, DDR-4500, Dessau

    H. -J. Koppe & W. Mörke

Authors
  1. H. Mehner
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. H. -J. Koppe
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. W. Mörke
    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

Mehner, H., Koppe, H.J. & Mörke, W. Mössbauer investigations of γ-Fe2O3 particles. Hyperfine Interact 54, 609–612 (1990). https://doi.org/10.1007/BF02396098

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02396098

Keywords

Search

Navigation