Abstract
The magnetic material Sm 2Fe 17N x (0 < x < 6) can be prepared by reacting Sm 2Fe 17 in an NH 3-H 2 mixed gas atmosphere. As a fine powder, Sm 2Fe 17N x ( x = 3.0–3.2) exhibits the characteristics of single magnetic domain particles. The oxygen content of the particle increases to about 5 at.% with increasing specific surface area, but such an oxidized region is largely confined to an outer layer of the particle. The thickness of the O-rich layer is about 10 nm, as observed by transmission electron microscopy and Auger electron spectroscopy.
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