Hyperfine Interactions

, Volume 94, Issue 1, pp 1983–1987 | Cite as

Mössbauer studies of nano-sized aluminum-substituted maghemites

  • G. M. da Costa
  • E. De Grave
  • A. M. Bryan
  • L. H. Bowen
Magnetism and Magnetic Materials

Abstract

Several Al-maghemites prepared from Al-lepidocrocites have been studied by Mössbauer spectroscopy from 6 to 300 K, and also at 4.2 K with an applied field of 6 T. A linear decrease in the A and B site fields at 4.2 K for samples containing up to 10% of aluminum suggests a limit for the substitution. The importance of applied-field measurements for a correct characterization of small-particle maghemite is also shown.

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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • G. M. da Costa
    • 1
  • E. De Grave
    • 1
    • 3
  • A. M. Bryan
    • 2
  • L. H. Bowen
    • 2
  1. 1.Laboratory of MagnetismUniversity of GentGentBelgium
  2. 2.Department of ChemistryNorth Carolina State UniversityRaleighUSA
  3. 3.National Fund for Scientific ResearchBelgium

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