Open AccessA STUDY ON THE MAGNETIC PROPERTIES OF SURFACE OXIDE LAYERS OF ULTRAFINE IRON PARTICLES
Author(s) -
Jian Wu,
LU HUAl-XIAN,
Du You-Wei,
GAO XUE-KUI,
WANG TING-XIANG
Publication year - 1988
Publication title -
acta physica sinica
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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom