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Adding Remnant Magnetization and Anisotropic Exchange to Propeller‐like Single‐Molecule Magnets through Chemical Design
Author(s) -
Westrup Kátia Cristina M.,
Boulon MarieEmmanuelle,
Totaro Pasquale,
Nunes Giovana G.,
Back Davi F.,
Barison Andersson,
Jackson Martin,
Paulsen Carley,
Gatteschi Dante,
Sorace Lorenzo,
Cornia Andrea,
Soares Jaísa F.,
Sessoli Roberta
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201403361
Subject(s) - magnetization , vanadium , magnetic anisotropy , anisotropy , condensed matter physics , ground state , spins , single molecule magnet , magnet , spin (aerodynamics) , chemistry , materials science , magnetic field , physics , atomic physics , inorganic chemistry , quantum mechanics , thermodynamics
The selective replacement of the central iron(III) ion with vanadium(III) in a tetrairon(III) propeller‐shaped single‐molecule magnet has allowed us to increase the ground spin state from S =5 to S =13/2. As a consequence of the pronounced anisotropy of vanadium(III), the blocking temperature for the magnetization has doubled. Moreover, a significant remnant magnetization, practically absent in the parent homometallic molecule, has been achieved owing to the suppression of zero‐field tunneling of the magnetization for the half‐integer molecular spin. Interestingly, the contribution of vanadium(III) to the magnetic anisotropy barrier occurs through the anisotropic exchange interaction with iron(III) spins and not through single ion anisotropy as in most single‐molecule magnets.