https://doi.org/10.1140/epjb/e2009-00430-x
Loss of single-molecule-magnet behavior of a Mn12-based compound assembled in a monolayer
1
IPCMS, CNRS-UMR 7504, Université de Strasbourg, 23
rue du Lœss, BP43, 67034 Strasbourg, France
2
CELLS-ALBA
Edifici Cn.- Mòdul C/3 Campus UAB,
08193 Bellaterra, Barcelona, Spain
3
Paul Scherer Institut – Swiss Light Source
5232 Villigen-PSI, Switzerland
Corresponding author: jean-louis.gallani@ipcms.u-strasbg.fr
Received:
30
March
2009
Revised:
19
October
2009
Published online:
17
December
2009
Magnetic circular dichroism magnetization measurements on a monolayer of single molecule magnets have been performed and the results are presented. At the measurement temperature (2 K) the hysteresis cycle shows no opening, contrary to what is seen in the bulk with SQUID magnetometry. This result could surprisingly imply that XMCD is unsuited for such measurements given the fact that it excites the core electrons at the origin of the magnetism. This result could also mean that the blocking temperature is greatly decreased or that these molecules loose their hallmark when deposited as adsorbed films, precluding therefore their much sought-after use in magnetic memories.
PACS: 75.50.Xx – Molecular magnets / 75.70.Ak – Magnetic properties of monolayers and thin films / 78.70.Dm – X-ray absorption spectra
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009