Surface Deposition Induced Reduction of the Ground State Spin in Cr10 Wheel

Bartolomé, Elena ; Ferrari, Ludovica ; Sedona, Francesco ; Arauzo, Ana (Universidad de Zaragoza) ; Rubín, Javier (Universidad de Zaragoza) ; Luzón, Javier ; Herrero-Albillos, Julia (Universidad de Zaragoza) ; Panighel, Mirco ; Mugarza, Aitor ; Rancan, Marzio ; Sambi, Mauro ; Armelao, Lidia ; Bartolomé, Juan (Universidad de Zaragoza) ; Bartolomé, Fernando

Resumen: 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.

Idioma: Inglés

DOI: 10.1002/admi.202300146

Año: 2023

Publicado en: Advanced Materials Interfaces 10, 20 (2023), 2300146 [15 pp.]
ISSN: 2196-7350

Factor impacto JCR: 4.3 (2023)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 72 / 231 = 0.312 (2023) - Q2 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 153 / 439 = 0.349 (2023) - Q2 - T2

Factor impacto CITESCORE: 8.4 - Mechanics of Materials (Q1) - Mechanical Engineering (Q1)

Factor impacto SCIMAGO: 1.194 - Mechanics of Materials (Q1) - Mechanical Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FSE/E12-23R-RASMIA
Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2020-115159GB-I00/AEI/10.13039/501100011033

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)