In:
Advanced Materials Interfaces, Wiley, Vol. 10, No. 20 ( 2023-07)
Abstract:
We report the deposition of monolayers and multilayers of {Cr 10 (OMe) 20 (O 2 CCMe 3 ) 10 } wheels, hereafter {Cr 10 }, 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). {Cr 10 } 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 Cr 3+ ions interacting ferromagnetically, separated by two Cr 3+ antiferromagnetically coupled. The one‐monolayer (1ML) samples of {Cr 10 } 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 {Cr 10 } 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 {Cr 10 } to minor distortions of the intramolecular conformation might be exploited to control magnetism by external stimuli for applications.
Type of Medium:
Online Resource
ISSN:
2196-7350
,
2196-7350
DOI:
10.1002/admi.202300146
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2750376-8