A STUDY ON THE MAGNETIC PROPERTIES OF SURFACE OXIDE LAYERS OF ULTRAFINE IRON PARTICLES
- 1 January 1988
- journal article
- Published by Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences in Acta Physica Sinica
- Vol. 37 (12) , 2044-2047
- https://doi.org/10.7498/aps.37.2044
Abstract
The dependence of σs of ultrafine iron particles on their average diameter d is measured. It is found that the smaller the particles, the smaller their σs. The variation of σ with temperature, σ(T), which is irreversible, is also measured both in temperature rising and dropping processes. The experimental results can be explained by spin pinning in the oxide layers.Keywords
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