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Structural and Magnetic Properties of α-Fe2O3 Nanoparticles

TitoloStructural and Magnetic Properties of α-Fe2O3 Nanoparticles
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione1998
AutoriSuber, L., A. Santiago García, Fiorani D., Imperatori P., Testa A.M., Angiolini M., Montone Amelia, and Dormann J.L.
RivistaApplied Organometallic Chemistry
Volume12
Paginazione347-351
ISSN02682605
Abstract

The magnetic properties of α-Fe2O3 nanoparticles of different shapes (spherical, rhombohedral and acicular), prepared as powders by a chemical route, have been investigated. The particle size effect on the Morin transition (TM = 263 K in the bulk system) have been studied by analyzing the temperature dependence of the zero-field-cooled (ZFC) and field-cooled (FC) magnetization. For spherical (average diameter between 10 and 50 nm) and rhombohedral (edge between 30 and 350 nm) particles, the Morin temperature was found to decrease with decreasing particle size and increasing magnetic field. On the other hand, acicular particles (major axis between 300 and 700 nm, minor axis between 70 and 100 nm) do not show the Morin transition, unless annealed. © 1998 John Wiley & Sons, Ltd.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-0000287548&partnerID=40&md5=03d376d44146f6d5be6fd4950af88605
Citation KeySuber1998347