Surface Deposition Induced Reduction of the Ground State Spin in Cr10 Wheel
Source abstract
Abstract
Abstract We report the deposition of monolayers and multilayers of {Cr10(OMe)20(O2CCMe3)10} wheels, hereafter {Cr10}, onto Au(111) and Cu(111) single‐crystal substrates, and their characterization combining scanning tunneling microscopy, X‐ray photoelectron spectroscopy, X‐ray absorption spectroscopy, X‐ray natural linear dichroism, and X‐ray magnetic circular dichroism (XMCD). {Cr10} in bulk shows axial magnetic anisotropy and a cluster total spin S = 9 ground state, stemming from an interaction scheme of two semi‐crowns containing four Cr3+ ions interacting ferromagnetically, separated by two Cr3+ antiferromagnetically coupled. The one‐monolayer (1ML) samples of {Cr10} sublimated on Ag(111) and Cu(111) show slightly different applied magnetic field dependence of XMCD signal. The field‐dependence of the magnetization evolves from a lower curve for the 1ML {Cr10} samples to a curve resembling the bulk one as the number of layers is increased, as shown in a 14ML sample. Monte Carlo simulations allow rationalizing the magnetization curves of the 1ML samples in terms of a reduction of the cluster ground‐state total spin, S = 3 or S = 6, as a consequence of variations in the intra‐wheel coupling interactions induced by the on‐surface deposition. The sensitivity of the magnetic configuration of {Cr10} to minor distortions of the intramolecular conformation might be exploited to control magnetism by external stimuli for applications.
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Research context
OpenAlex topics: Magnetism in coordination complexes · Nanocluster Synthesis and Applications · Lanthanide and Transition Metal Complexes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Escola Universitària Salesiana de Sarrià (EUSS) Passeig Sant Joan Bosco 74 Barcelona 08017 Spain
Dipartimento di Scienze Chimiche Università di Padova Via Marzolo 1 Padova 35131 Italy
Instituto de Nanociencia y Materiales de Aragón (INMA) Universidad de Zaragoza – CSIC Pedro Cerbuna 12 Zaragoza 50009 Spain
Departamento de Física de la Materia Condensada Universidad de Zaragoza Pedro Cerbuna 12 Zaragoza 50009 Spain
Departamento de Ciencia y Tecnología de Materiales y Fluidos Escuela de Ingeniería y Arquitectura Universidad de Zaragoza María de Luna 3 Zaragoza 50018 Spain
Centro Universitario de la Defensa Academia General Militar Zaragoza Spain
CNR‐IOM Laboratorio TASC Basovizza Trieste 34149 Italy
Catalan Institute of Nanoscience and Nanotechnology (ICN2) CSIC and BIST Campus UAB Barcelona 08193 Spain
ICREA – Institució Catalana de Recerca i Estudis Avançats Barcelona 08010 Spain
Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE) National Research Council (CNR) c/o Department of Chemical Sciences University of Padova via F. Marzolo 1 Padova 35131 Italy
Department of Chemical Sciences and Materials Technologies (DSCTM) National Research Council (CNR) Piazzale A. Moro 7 Roma 00185 Italy
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