APPLIED-FIELD MOSSBAUER STUDIES OF THE IRON STORAGE PROTEINS FERRITINAND HEMOSIDERIN

Citation
C. Hunt et al., APPLIED-FIELD MOSSBAUER STUDIES OF THE IRON STORAGE PROTEINS FERRITINAND HEMOSIDERIN, Hyperfine interactions, 91(1-4), 1994, pp. 821-826
Citations number
10
Categorie Soggetti
Physics, Atomic, Molecular & Chemical","Physics, Nuclear","Physics, Condensed Matter
Journal title
ISSN journal
03043843
Volume
91
Issue
1-4
Year of publication
1994
Pages
821 - 826
Database
ISI
SICI code
0304-3843(1994)91:1-4<821:AMSOTI>2.0.ZU;2-T
Abstract
Applied field Mossbauer spectra obtained from ferritin and haemosideri n have been fitted using a spin-Hamiltonian model, to determine the ef fect of the applied field on the direction of the iron magnetic moment s. The results of these fits indicate that the ordering of magnetic mo ments within the ferrihydrite core of these proteins is antiferromagne tic. The values of the anisotropy field obtained from these fits corre spond to much higher values of the superparamagnetic blocking temperat ures than those actually observed. This anomaly has implications for o ur understanding of the superparamagnetic relaxation processes in thes e materials.