SURFACE MAGNETIC STRUCTURE OF SMALL γ-Fe2O3 PARTICLES
- 1 December 1976
- journal article
- Published by EDP Sciences in Le Journal de Physique Colloques
- Vol. 37 (C6) , C6-301
- https://doi.org/10.1051/jphyscol:1976663
Abstract
Iron enriched in the isotope Fe57 has been incorporated into the surface of micron-sized γ-Fe2O3 particles in order to study the magnetic structure of the outermost cations. Mössbauer spectra in external longitudinal magnetic fields of 50 kOe establish that a non-collinear structure exists from 4.2 K to room temperature. Over this temperature range the canting angle, averaged over all cations, decreases by a factor of about two. The surface structure is discussed in terms of some possible modelsKeywords
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