Journal article
Spin reorientation in α-Fe2O3 nanoparticles induced by interparticle exchange interactions in alpha-Fe2O3/NiO nanocomposites
Surface Physics and Catalysis, Department of Physics, Technical University of Denmark1
Department of Physics, Technical University of Denmark2
Electrofunctional materials, Department of Energy Conversion and Storage, Technical University of Denmark3
Department of Energy Conversion and Storage, Technical University of Denmark4
SimCorp A/S5
Paul Scherrer Institute6
Center for Electron Nanoscopy, Technical University of Denmark7
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.
Language: | English |
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Year: | 2011 |
ISSN: | 1550235x , 10980121 and 01631829 |
Types: | Journal article |
DOI: | 10.1103/PhysRevB.84.214435 |
ORCIDs: | 0000-0003-4282-756X , Frandsen, Cathrine , Bahl, Christian Robert Haffenden , Kuhn, Luise Theil and Kasama, Takeshi |