Tuning the Ferrotoroidic Coupling and Magnetic Hysteresis in Double-Triangle Complexes {(Dy3MDy3)-Dy-III} via the M-III-linker
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Ashtree, JM; Borilovi, I; Vignesh, KR; Swain, A; Hamilton, SH; Whyatt, YL; Benjamin, SL; Phonsri, W; Forsyth, CM; Wernsdorfer, W; ...Date
2020-12-23Source Title
European Journal of Inorganic ChemistryPublisher
WILEY-V C H VERLAG GMBHAffiliation
School of ChemistryMetadata
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Ashtree, J. M., Borilovi, I., Vignesh, K. R., Swain, A., Hamilton, S. H., Whyatt, Y. L., Benjamin, S. L., Phonsri, W., Forsyth, C. M., Wernsdorfer, W., Soncini, A., Rajaraman, G., Langley, S. K. & Murray, K. S. (2020). Tuning the Ferrotoroidic Coupling and Magnetic Hysteresis in Double-Triangle Complexes {(Dy3MDy3)-Dy-III} via the M-III-linker. EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2021 (5), https://doi.org/10.1002/ejic.202001082.Access Status
This item is embargoed and will be available on 2021-12-31Abstract
We present the syntheses, structures, magnetic data and theoretical analyses for two families of heptanuclear clusters, wherein two staggered dysprosium(III) triangles are linked by various M(III) d-/p-block ions. The families differ in the counter-anion and are of formulae [DyIII6MIII(OH)8(o-tol)12(MeOH)5(NO3)] ⋅ 4MeOH and [DyIII6MIII(OH)8(o-tol)12(MeOH)6]Cl ⋅ 6MeOH (M=Cr, Mn, Fe, Co, Al; o-tol=o-toluate). We find that variation of the central metal ion M is crucial in tuning the toroidal moments on the triangular units, with diamagnetic M linking ions enhancing the ferrotoroidic coupling. By detailed simulation and analysis of various magnetic measurements, including sub-kelvin microSquid hysteresis loops, we identified the specific signature of the M linking ions’ modulation of toroidal properties, including the mechanism whereby anisotropic, paramagnetic M ions lead to hysteresis profiles with larger remnant magnetisations and broader coercive fields.
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