The Role of Rare‐Earth Atoms in the Anisotropy and Antiferromagnetic Exchange Coupling at a Hybrid Metal–Organic Interface
Source abstract
Abstract
Abstract 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 f RE atoms to hybrid metal–organic interfaces of CuPc/REAu 2 type (RE = Gd, Ho) constitutes a feasible approach toward on‐demand magnetic properties and functionalities. The GdAu 2 and HoAu 2 substrates differ in their magnetic anisotropy behavior. Remarkably, the HoAu 2 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 d –4 f superexchange interaction between the unpaired 3 d electron of CuPc and the 4 f electrons of the RE atoms. It is shown that 4 f RE atoms with unquenched quantum orbital momentum (), as it is the case of Ho, induce an anisotropic interfacial exchange coupling.
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Research context
OpenAlex topics: Advanced Condensed Matter Physics · Magnetic and transport properties of perovskites and related materials · Magnetic properties of thin films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología Universidad del País Vasco UPV/EHU San Sebastián 20018 Spain
Centro de Física de Materiales CSIC‐UPV/EHU‐Materials Physics Center San Sebastián 20018 Spain
Donostia International Physics Center Donostia‐San Sebastián 20018 Spain
Chalmers University of Technology, Göteborg Göteborg 412 96 Sweden
ALBA Synchrotron Light Source Cerdanyola del Vallès 08290 Spain
Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC and BIST, Campus UAB Barcelona 08193 Spain
J. Heyrovský Institute of Physical Chemistry Czech Academy of Sciences Prague 18223 Czech Republic
Institut de Ciència de Materials de Barcelona ICMAB‐CSIC, Campus UAB Bellaterra 08193 Spain
Instituto Madrileño de Estudios Avanzados IMDEA Nanociencia Madrid 28049 Spain
ICREA‐Institució Catalana de Recerca i Estudis Avançats Barcelona 08010 Spain
Departamento de Física Aplicada I Universidad del País Vasco UPV/EHU San Sebastián 20018 Spain
CIC nanoGUNE‐BRTA San Sebastián 20018 Spain
Funding
Ministerio de Ciencia, Innovación y Universidades · Horizon 2020 Framework Programme · Generalitat de Catalunya · Diputación Foral de Gipuzkoa
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