Open AccessA STUDY ON THE MAGNETIC PROPERTIES OF SURFACE OXIDE LAYERS OF ULTRAFINE IRON PARTICLES
Author(s) -
Wu Jian,
LU HUAl-XIAN,
Yong Du,
Gao Xue-Kui,
Wang Ting-Xiang
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.2044
Subject(s) - materials science , oxide , condensed matter physics , iron oxide , ultrafine particle , nanotechnology , metallurgy , physics
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.