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Magnetic anisotropy switch: Easy axis to easy plane conversion and vice versa

AuthorsPerfetti, Mauro; Sørensen, Mikkel A.; Hansen, Ursula B.; Bamberger, Heiko; Lenz, Samuel; Hallmen, Philipp P.; Fennell, Tom; Simeoni, Giovanna G.; Arauzo, Ana B.; Bartolomé, Juan; Bartolomé, Elena ; Lefmann, Kim; Weihe, Høgni; Slageren, Joris van; Bendix, Jesper
Issue Date2018
CitationAdvanced Functional Materials 28(32): 1801846 (2018)
AbstractThe rational design of the magnetic anisotropy of molecular materials constitutes a goal of primary importance in molecular magnetism. Indeed, the applications of molecular nanomagnets, such as single-molecule magnets and molecular magnetic refrigerants, depend on the full control over this property. Axially anisotropic magnetic systems are frequently classified as easy axis or easy plane, depending on whether the lowest energy is obtained by application of a magnetic field parallelly or perpendicularly to the unique axis. Here, the magnetic aniso-tropy of three lanthanide complexes is studied as a function of magnetic field and temperature. It is found that for two of these the type of magnetic aniso-tropy switches as a function of these parameters. Thus, this paper experimen-tally demonstrates that the magnetic anisotropy is not uniquely defined by the intrinsic electronic structure of the systems in question but can also be reversibly switched using external stimuli: temperature and magnetic field.
Publisher version (URL)https://doi.org/10.1002/adfm.201801846known
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