Dimensional effects in the properties of maghemite

Single-phase γ-Fe 2 O 3 powders with a coercivity of 161–263 Oe are obtained from iron(III) hydroxide by hydrothermal synthesis followed by heat treatment. Particle size distributions are plotted, based on the TEM data. Magnetic measurements show that a significant decrease in the squareness ratio a...

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Veröffentlicht in:	Bulletin of the Russian Academy of Sciences. Physics 2012-10, Vol.76 (10), p.1146-1148
Hauptverfasser:	Osmolovsky, M. G., Osmolovskaya, O. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Coercivity Hadrons Heat treatment Heavy Ions Hematite Iron oxides Magnetic measurement Nuclear Physics Particle size Physics Physics and Astronomy Proceedings of the International Simposium “Ordering in Minerals and Alloys” OMA-14
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Single-phase γ-Fe 2 O 3 powders with a coercivity of 161–263 Oe are obtained from iron(III) hydroxide by hydrothermal synthesis followed by heat treatment. Particle size distributions are plotted, based on the TEM data. Magnetic measurements show that a significant decrease in the squareness ratio and coercivity occurs at a mean particle volume of 60000 nm 3 .
ISSN:	1062-8738 1934-9432
DOI:	10.3103/S1062873812100085