Engineering Chemisorption of Fe 4 Single‐Molecule Magnets on Gold - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Advanced Materials Interfaces Année : 2021

Engineering Chemisorption of Fe 4 Single‐Molecule Magnets on Gold

Edwige Otero
Philippe Ohresser
Jean Paul Kappler

Résumé

Gaining control over the grafting geometry is critically important for any application of surface-supported single-molecule magnets (SMMs) in data storage, spintronics, and quantum information science. Here, tetrairon(III) SMMs with a propeller-like structure are functionalized with thioacetyl-terminated alkyl chains to promote chemisorption on gold surfaces from solution and to evaluate differences in adsorption geometry and magnetic properties as a function of chain length. The prepared monolayers are investigated using X-ray absorption techniques with linearly and circularly polarized light to extract geometrical and magnetic information, respectively. All derivatives remain intact and form partially oriented monolayers on the gold surface. A ligand-field analysis of the observed X-ray natural linear dichroism shows that the threefold molecular axis is invariably biased toward the surface normal, in agreement with ab initio calculations. This preferential orientation is most pronounced in monolayers of the shortest-chain derivative, which are further studied with an ultralow temperature X-ray magnetic circular dichroism setup operating down to 350 mK. The isothermal field sweeps with the magnetic field at normal incidence show an open hysteresis loop below 1 K, while measurements at different incidence angles prove the magnetic anisotropy of the monolayers.
Fichier principal
Vignette du fichier
admi.202101182.pdf (962.47 Ko) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-03448211 , version 1 (25-11-2021)

Identifiants

Citer

Lorenzo Poggini, Erik Tancini, Chiara Danieli, Andrea Luigi Sorrentino, Giulia Serrano, et al.. Engineering Chemisorption of Fe 4 Single‐Molecule Magnets on Gold. Advanced Materials Interfaces, 2021, 8 (24), ⟨10.1002/admi.202101182⟩. ⟨hal-03448211⟩
45 Consultations
62 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More