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Single-chain magnet behavior in a finite linear hexanuclear molecule

Abstract : The careful monitoring of crystallization conditions of a mixture made of a Tb-III building block and a substituted nitronyl-nitroxide that typically provides infinite coordination polymers (chains), affords a remarkably stable linear hexanuclear molecule made of six Tb-III ions and five NIT radicals. The hexanuclear units are double-bridged by water molecules but ab initio calculations demonstrate that this bridge is inefficient in mediating any magnetic interaction other than a small dipolar antiferromagnetic coupling. Surprisingly the hexanuclears, despite being finite molecules, show a single-chain magnet (SCM) behavior. This results in a magnetic hysteresis at low temperature whose coercive field is almost doubled when compared to the chains. We thus demonstrate that finite linear molecules can display SCM magnetic relaxation, which is a strong asset for molecular data storage purposes because 1D magnetic relaxation is more robust than the relaxation mechanisms observed in single-molecule magnets (SMMs) where under-barrier magnetic relaxation can operate.
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https://hal.archives-ouvertes.fr/hal-03331002
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Wednesday, September 1, 2021 - 1:48:26 PM
Last modification on : Friday, September 3, 2021 - 3:11:09 AM

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Felix Houard, Frédéric Gendron, Yan Suffren, Thierry Guizouarn, Vincent Dorcet, et al.. Single-chain magnet behavior in a finite linear hexanuclear molecule. Chemical Science , The Royal Society of Chemistry, 2021, 12 (31), pp.10613-10621. ⟨10.1039/d1sc02033a⟩. ⟨hal-03331002⟩

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