Engineering the magnetic coupling and anisotropy at the molecule–magnetic surface interface in molecular spintronic devices

Victoria E. Campbell (), Monica Tonelli, Irene Cimatti, Jean-Baptiste Moussy, Ludovic Tortech, Yannick J. Dappe, Eric Rivière, Régis Guillot, Sophie Delprat, Richard Mattana, Pierre Seneor, Philippe Ohresser, Fadi Choueikani, Edwige Otero, Florian Koprowiak, Vijay Gopal Chilkuri, Nicolas Suaud, Nathalie Guihéry, Anouk Galtayries, Frederic Miserque, Marie-Anne Arrio, Philippe Sainctavit and Talal Mallah ()
Additional contact information
Victoria E. Campbell: Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay
Monica Tonelli: Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay
Irene Cimatti: Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay
Jean-Baptiste Moussy: SPEC, CEA, CNRS, Univesité Paris Saclay
Ludovic Tortech: IPCM, UMR CNRS 7201, UPMC, Université Pierre et Marie Curie
Yannick J. Dappe: SPEC, CEA, CNRS, Univesité Paris Saclay
Eric Rivière: Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay
Régis Guillot: Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay
Sophie Delprat: Unité Mixte de Physique CNRS/Thales
Richard Mattana: Unité Mixte de Physique CNRS/Thales
Pierre Seneor: Unité Mixte de Physique CNRS/Thales
Philippe Ohresser: Synchrotron SOLEIL
Fadi Choueikani: Synchrotron SOLEIL
Edwige Otero: Synchrotron SOLEIL
Florian Koprowiak: Laboratoire de Chimie et Physique Quantiques
Vijay Gopal Chilkuri: Laboratoire de Chimie et Physique Quantiques
Nicolas Suaud: Laboratoire de Chimie et Physique Quantiques
Nathalie Guihéry: Laboratoire de Chimie et Physique Quantiques
Anouk Galtayries: PSL Research University, Chimie ParisTech-CNRS, Institut de Recherche de Chimie Paris
Frederic Miserque: CEA/DEN/DANS/DPC/SCCME, Laboratoire d'Etude de la Corrosion Aqueuse
Marie-Anne Arrio: IMPMC-CNRS, Université Pierre et Marie Curie
Philippe Sainctavit: Synchrotron SOLEIL
Talal Mallah: Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO), CNRS, Université Paris Sud, Université Paris Saclay

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract A challenge in molecular spintronics is to control the magnetic coupling between magnetic molecules and magnetic electrodes to build efficient devices. Here we show that the nature of the magnetic ion of anchored metal complexes highly impacts the exchange coupling of the molecules with magnetic substrates. Surface anchoring alters the magnetic anisotropy of the cobalt(II)-containing complex (Co(Pyipa)2), and results in blocking of its magnetization due to the presence of a magnetic hysteresis loop. In contrast, no hysteresis loop is observed in the isostructural nickel(II)-containing complex (Ni(Pyipa)2). Through XMCD experiments and theoretical calculations we find that Co(Pyipa)2 is strongly ferromagnetically coupled to the surface, while Ni(Pyipa)2 is either not coupled or weakly antiferromagnetically coupled to the substrate. These results highlight the importance of the synergistic effect that the electronic structure of a metal ion and the organic ligands has on the exchange interaction and anisotropy occurring at the molecule–electrode interface.

Date: 2016
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DOI: 10.1038/ncomms13646

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