Study of the influence of nuclear spin and dilution over the slow relaxation in a 3d4f heterobimetallic single-molecule magnet
Résumé
The effects of isotopic enrichment and magnetic dilution have been investigated in a heterobimetallic complex of formula [ZnLDyCl]·2HO (DyZn) (A = 162 and 163) presenting slow relaxation of the magnetization. Isotopic substitution for Dy (I = 0) and Dy (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.
Domaines
Chimie
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Gonzales et al - 2021 - Study of the influence of nuclear spin and dilution.pdf (1.13 Mo)
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Gonzales_d1dt01608c1.pdf (1.3 Mo)
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