• Castrillo-Bodero, Rodrigo
• Mugarza, Aitor
• Gastaldo, Michele
• Paradinas, Markos
• Ilyn, Maxim
• Ali, Khadiza
• Valbuena Martinez, Miguel Angel
• Schiller, Frederik
• Gargiani, Pierluigi
• Ortega, J. E.
• Rey, Maria Blanco
• Fernandez, Laura

Abstract

<jats:title>Abstract</jats:title><jats:p>Magnetic anisotropy and magnetic exchange interactions are crucial parameters that characterize the hybrid metal–organic interface, a key component of an organic spintronic device. It is shown that the incorporation of 4<jats:italic>f</jats:italic> RE atoms to hybrid metal–organic interfaces of CuPc/REAu<jats:sub>2</jats:sub> type (RE = Gd, Ho) constitutes a feasible approach toward on‐demand magnetic properties and functionalities. The GdAu<jats:sub>2</jats:sub> and HoAu<jats:sub>2</jats:sub> substrates differ in their magnetic anisotropy behavior. Remarkably, the HoAu<jats:sub>2</jats:sub> surface promotes the inherent out‐of‐plane anisotropy of CuPc, owing to the match between the anisotropy axis of substrate and molecule. Furthermore, the presence of RE atoms leads to a spontaneous antiferromagnetic exchange coupling at the interface, induced by the 3<jats:italic>d</jats:italic>–4<jats:italic>f</jats:italic> superexchange interaction between the unpaired 3<jats:italic>d</jats:italic> electron of CuPc and the 4<jats:italic>f</jats:italic> electrons of the RE atoms. It is shown that 4<jats:italic>f</jats:italic> RE atoms with unquenched quantum orbital momentum (), as it is the case of Ho, induce an anisotropic interfacial exchange coupling.</jats:p>

Topics

• impedance spectroscopy
• surface
• anisotropic