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Study of the influence of nuclear spin and dilution over the slow relaxation in a 3d4f heterobimetallic single-molecule magnet

Abstract : The effects of isotopic enrichment and magnetic dilution have been investigated in a heterobimetallic complex of formula [(Zn2L2DyCl3)-Dy-A]center dot 2H(2)O (ADyZn(2)) (A = 162 and 163) presenting slow relaxation of the magnetization. Isotopic substitution for Dy-162 = 0) and Dy-163 (I = 5/2) leads to a shift in the relaxation times depending on the suppression or enhancement of the hyperfine interactions. The release of the dipolar interactions through magnetic dilution in a Y(iii)-based matrix enhances the slow relaxation of the magnetization and the visibility of the nuclear spin effect. A comparison of the hysteresis loop at 0.5 K for bulk and diluted analogues of pure isotopically enriched complexes suggested a role of the nuclear spin in the interaction between the active system and the matrix.
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https://hal.archives-ouvertes.fr/hal-03331218
Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Thursday, September 16, 2021 - 2:44:53 PM
Last modification on : Thursday, September 16, 2021 - 2:44:57 PM

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Jessica Flores Gonzalez, Bertrand Lefeuvre, Bastien Degraeve, Olivier Cador, Fabrice Pointillart. Study of the influence of nuclear spin and dilution over the slow relaxation in a 3d4f heterobimetallic single-molecule magnet. Dalton Transactions, Royal Society of Chemistry, 2021, 50, pp.11466-11471. ⟨10.1039/d1dt01608c⟩. ⟨hal-03331218⟩

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