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Evidence of a C60 /Co interface reconstruction and its influence on magnetic properties

Abstract : By using grazing incidence x-ray diffraction and scanning tunneling microscopy experiments, we determine the interface structure of a C 60 layer deposited on a Co(0001) surface. The room temperature deposition gives rise to a (4 × 4) molecular structure with a 10% vertical relaxation of the underneath Co atoms. When annealed around 550 K, the interface undergoes a structural change with most of the buckyballs sitting in a seven Co vacancies nanohole. Ab initio calculations show that this interface reconstruction is stabilized by a strong C-Co hybridization and has a significant impact both on the interfacial magnetic anisotropy that is decreased and on the molecular spin polarization that it increased.
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Submitted on : Monday, January 24, 2022 - 11:39:42 AM
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Cynthia Fourmental, Ludovic Le Laurent, Vincent Repain, Cyril Chacon, yann Girard, et al.. Evidence of a C60 /Co interface reconstruction and its influence on magnetic properties. Physical Review B, American Physical Society, 2021, 104 (23), pp.235413. ⟨10.1103/PhysRevB.104.235413⟩. ⟨hal-03540843⟩

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