Spin reorientation in α-Fe2O3 nanoparticles induced by interparticle exchange interactions in alpha-Fe2O3/NiO nanocomposites

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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We report that the spin structure of alpha-Fe2O3 nanoparticles rotates coherently out of the basal (001) plane at low temperatures when interacting with thin plate-shaped NiO nanoparticles. The observed spin reorientation (up to similar to 70 degrees) in alpha-Fe2O3 nanoparticles has, in appearance, similarities to the Morin transition in bulk alpha-Fe2O3, but its origin is different-it is caused by exchange coupling between aggregated nanoparticles of alpha-Fe2O3 and NiO with different directions of easy axes of magnetization.
Original languageEnglish
JournalPhysical Review B (Condensed Matter and Materials Physics)
Publication date2011
Volume84
Journal number21
Pages214435 (10 pages)
ISSN1098-0121
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 1

Keywords

  • HEMATITE NANOPARTICLES, Dependence, Physics, MAGNETIC-PROPERTIES, AGGREGATION, CRYSTAL-GROWTH, ANISOTROPY, Size, NIO NANOPARTICLES
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