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Brok, Erik
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Publications (7/7 displayed)
- 2021The microscopic distribution of hydrophilic polymers in interpenetrating polymer networks (IPNs) of medical grade siliconecitations
- 2020Casein micelles in milk as sticky spherescitations
- 2017Induced Mesocrystal-Formation, Hydrothermal Growth and Magnetic Properties of α-Fe2O3 Nanoparticles in Salt-Rich Aqueous Solutionscitations
- 2017Off-axis spin orientation in goethite nanoparticlescitations
- 2017Spin orientation in solid solution hematite-ilmenitecitations
- 2015Polarized neutron powder diffraction studies of antiferromagnetic order in bulk and nanoparticle NiOcitations
- 2011Spin reorientation in α-Fe2O3 nanoparticles induced by interparticle exchange interactions in alpha-Fe2O3/NiO nanocompositescitations
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article
Spin reorientation in α-Fe2O3 nanoparticles induced by interparticle exchange interactions in alpha-Fe2O3/NiO nanocomposites
Abstract
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.