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    Tuning the Ferrotoroidic Coupling and Magnetic Hysteresis in Double-Triangle Complexes {(Dy3MDy3)-Dy-III} via the M-III-linker

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    Author
    Ashtree, JM; Borilovi, I; Vignesh, KR; Swain, A; Hamilton, SH; Whyatt, YL; Benjamin, SL; Phonsri, W; Forsyth, CM; Wernsdorfer, W; ...
    Date
    2020-12-23
    Source Title
    European Journal of Inorganic Chemistry
    Publisher
    WILEY-V C H VERLAG GMBH
    University of Melbourne Author/s
    Soncini, Alessandro; Ashtree, Jared
    Affiliation
    School of Chemistry
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    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 2021-12-31
    URI
    http://hdl.handle.net/11343/260489
    DOI
    10.1002/ejic.202001082
    ARC Grant code
    ARC/DP170100034
    ARC/FT180100519
    Abstract
    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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