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Antiferromagnetic interlayer exchange coupling between Fe3O4 layers across a nonmagnetic MgO dielectric layer
We have investigated the interlayer exchange coupling between the epitaxial spinel Fe3O4 layers across an insulating nonmagnetic MgO spacer. The epitaxial structure used for these investigations was Fe3O4 (10nm)∕MgO (0.8–3nm)∕Fe3O4 (10nm)∕NiO (15nm) multilayers grown on MgO (100) substrates. We find...
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Published in: | Applied physics letters 2008-05, Vol.92 (18) |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | We have investigated the interlayer exchange coupling between the epitaxial spinel Fe3O4 layers across an insulating nonmagnetic MgO spacer. The epitaxial structure used for these investigations was Fe3O4 (10nm)∕MgO (0.8–3nm)∕Fe3O4 (10nm)∕NiO (15nm) multilayers grown on MgO (100) substrates. We find that the two Fe3O4 layers are antiferromagnetic coupled through the MgO spacer when the MgO thickness is less than 1.5nm. Furthermore, ab initio calculation of IEC for Fe∕MgO∕Fe indicates the importance of electrode states, in particular, partial oxidation of the ferromagnetic electrodes. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.2919081 |