The Role of Rare-Earth Atoms in the Anisotropy and Antiferromagnetic Exchange Coupling at a Hybrid Metal–Organic Interface
Artikel i vetenskaplig tidskrift, 2024

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 4f RE atoms to hybrid metal–organic interfaces of CuPc/REAu2 type (RE = Gd, Ho) constitutes a feasible approach toward on-demand magnetic properties and functionalities. The GdAu2 and HoAu2 substrates differ in their magnetic anisotropy behavior. Remarkably, the HoAu2 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 3d–4f superexchange interaction between the unpaired 3d electron of CuPc and the 4f electrons of the RE atoms. It is shown that 4f RE atoms with unquenched quantum orbital momentum ((Formula presented.)), as it is the case of Ho, induce an anisotropic interfacial exchange coupling.

hybrid metal-organic interfaces

magnetic anisotropy

rare-earths

AFM exchange coupling

X-ray magnetic circular dichroism spectroscopy

Författare

M. Blanco-Rey

Consejo Superior de Investigaciones Científicas (CSIC)

Donostia International Physics Center

Universidad del Pais Vasco / Euskal Herriko Unibertsitatea

Rodrigo Castrillo

Donostia International Physics Center

Consejo Superior de Investigaciones Científicas (CSIC)

Khadiza Ali

Consejo Superior de Investigaciones Científicas (CSIC)

Donostia International Physics Center

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Pierluigi Gargiani

El Sincrotrón ALBA

M. Ilyn

Consejo Superior de Investigaciones Científicas (CSIC)

Michele Gastaldo

Czech Academy of Sciences

Institut Catala de Nanociencia i Nanotecnologia

Markos Paradinas

Consejo Superior de Investigaciones Científicas (CSIC)

Institut Catala de Nanociencia i Nanotecnologia

Miguel A. Valbuena

IMDEA Nanoscience Institute

Institut Catala de Nanociencia i Nanotecnologia

Aitor Mugarza

Institut Catala de Nanociencia i Nanotecnologia

Institucio Catalana de Recerca i Estudis Avancats

J. Enrique Ortega

Universidad del Pais Vasco / Euskal Herriko Unibertsitatea

Consejo Superior de Investigaciones Científicas (CSIC)

Donostia International Physics Center

F. Schiller

Consejo Superior de Investigaciones Científicas (CSIC)

L. Fernandez

CIC nanoGUNE

Consejo Superior de Investigaciones Científicas (CSIC)

Small

1613-6810 (ISSN) 1613-6829 (eISSN)

Vol. 20 45 2402328

Ämneskategorier (SSIF 2011)

Den kondenserade materiens fysik

DOI

10.1002/smll.202402328

Mer information

Senast uppdaterat

2025-03-09