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Hyperfine Interactions

, Volume 66, Issue 1–4, pp 71–82 | Cite as

Variation of superparamagnetic properties with iron loading in mammalian ferritin

  • Richard B. Frankel
  • Georgia C. Papaefthymiou
  • Gerald D. Watt
Invited Papers

Abstract

The average blocking temperatures of ferritin molecules containing differing amounts of iron were determined by Mossbauer spectroscopy. The results imply that the magnetic anisotropy of the ferritin core particles is a function of particle volume. By addition of57Fe to ferritin core particles it was determined that, at a given temperature within the superpara-magnetic temperature region, the “last-in” ferric ions have average relaxation times that are shorter than those of the bulk ferric ions.

Keywords

Iron Spectroscopy Thin Film Anisotropy Relaxation Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1991

Authors and Affiliations

  • Richard B. Frankel
    • 1
  • Georgia C. Papaefthymiou
    • 2
  • Gerald D. Watt
    • 3
  1. 1.Department of PhysicsCalifornia Polytechnic State UniversitySan Luis ObispoU.S.A.
  2. 2.Francis Bitter National Magnet LaboratoryMassachusetts Institute of TechnologyCambridgeU.S.A.
  3. 3.Department of ChemistryBrigham Young UniversityProvoU.S.A.

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