Open AccessMagnetic Hysteresis at 10 K in Single Molecule Magnet Self‐Assembled on Gold
Author(s) -
Chen ChiaHsiang,
Spree Lukas,
Koutsouflakis Emmanouil,
Krylov Denis S.,
Liu Fupin,
Brandenburg Ariane,
Velkos Georgios,
Schimmel Sebastian,
Avdoshenko Stanislav M.,
Fedorov Alexander,
Weschke Eugen,
Choueikani Fadi,
Ohresser Philippe,
Dreiser Jan,
Büchner Bernd,
Popov Alexey A.
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202000777
Subject(s) - fullerene , materials science , magnetization , magnetic hysteresis , magnet , monolayer , nanotechnology , hysteresis , self assembly , ferrocene , single molecule magnet , molecule , magnetic moment , crystallography , endohedral fullerene , chemistry , electrode , electrochemistry , condensed matter physics , organic chemistry , magnetic field , physics , quantum mechanics
Tremendous progress in the development of single molecule magnets (SMMs) raises the question of their device integration. On this route, understanding the properties of low‐dimensional assemblies of SMMs, in particular in contact with electrodes, is a necessary but difficult step. Here, it is shown that fullerene SMM self‐assembled on metal substrate from solution retains magnetic hysteresis up to 10 K. Fullerene‐SMM DySc 2 N@C 80 and Dy 2 ScN@C 80 are derivatized to introduce a thioacetate group, which is used to graft SMMs on gold. Magnetic properties of grafted SMMs are studied by X‐ray magnetic circular dichroism and compared to the films of nonderivatized fullerenes prepared by sublimation. In self‐assembled films, the magnetic moments of the Dy ions are preferentially aligned parallel to the surface, which is different from the disordered orientation of endohedral clusters in nonfunctionalized fullerenes. Whereas chemical derivatization reduces the blocking temperature of magnetization and narrows the hysteresis of Dy 2 ScN@C 80 , for DySc 2 N@C 80 equally broad hysteresis is observed as in the fullerene multilayer. Magnetic bistability in the DySc 2 N@C 80 grafted on gold is sustained up to 10 K. This study demonstrates that self‐assembly of fullerene‐SMM derivatives offers a facile solution‐based procedure for the preparation of functional magnetic sub‐monolayers with excellent SMM performance.