Journal
APL MATERIALS
Volume 8, Issue 6, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0011736
Keywords
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Funding
- Antiferromagnetic proximity effect and development of epitaxial bimetallic antiferromagnets - two routes towards next-generation spintronics project within the Homing programme of the Foundation for Polish Science - European Union under the European Regi
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A ferromagnet/antiferromagnet (FM/AFM) Fe/NiO bilayer was grown using molecular beam epitaxy on MgO(001) and Cr buffered MgO(001) substrates. X-ray linear dichroism measurements showed a dominating out-of-plane component for the NiO spins in Fe/NiO/MgO and an in-plane spin direction for NiO layers grown on the Cr buffer. Furthermore, systematic studies on the magnetic properties of Fe/NiO grown on the wedge-shaped Cr buffer revealed a continuous strain-induced spin reorientation transition from out-of-plane to in-plane NiO spin directions when the Cr thickness increased from 0 nm to 3.5 nm. The analysis of the in-plane magnetic structure of NiO in Fe/NiO/Cr showed a pronounced uniaxial anisotropy in thin AFM layers. The AFM spins are perpendicular to the Fe spins due to spin-flop interaction. These results demonstrate the feasibility of using strain and coupling with FMs to manipulate spin structures in NiO.
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