Perpendicular magnetic anisotropy of cobalt films intercalated under graphene

Abstract

Magnetic properties of nanometer thick Co films intercalated at the graphene/Ir(111) interface are investigated using spin-polarized low-energy electron microscopy (SPLEEM) and Auger electron spectroscopy. We show that the graphene top layer promotes perpendicular magnetic anisotropy in the Co film underneath, even for relatively thick intercalated deposits. The magnetic anisotropy energy is significantly larger for the graphene/Co interface than for the free Co surface. Hybridization of the graphene and Co electron orbitals is believed to be at the origin of the observed perpendicular magnetic anisotropy.

References in corpus (4)

• Half-Metallic Graphene Nanoribbons
• Graphite and graphene as perfect spin filters
• Coinage-metal capping effects on the spin-reorientations of Co/Ru(0001)
• Hydrogen-induced reversible spin-reorientation transition and magnetic stripe domain phase in bilayer Co on Ru(0001)

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• Confined step-flow growth of Cu intercalated between graphene and a Ru(0001) surface
• Impact of organic capping layer on the magnetic anisotropy of ultrathin Co films