| Title | Tuning the Ferrotoroidic Coupling and Magnetic Hysteresis in Double-Triangle Complexes {(Dy3MDy3)-Dy-III} via the M-III-linker |
| Publication Type | Journal Article |
| Year of Publication | 2021 |
| Authors | Ashtree, JM, Borilovi, I, Vignesh, KR, Swain, A, Hamilton, SH, Whyatt, YL, Benjamin, SL, Phonsri, W, Forsyth, CM, Wernsdorfer, W, Soncini, A, Rajaraman, G, Langley, SK, Murray, KS |
| Journal | EUROPEAN JOURNAL OF INORGANIC CHEMISTRY |
| Volume | 2021 |
| Pagination | 435-444 |
| Date Published | FEB 5 |
| ISSN | 1434-1948 |
| 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 [(Dy6MIII)-M-III(OH)(8)(o-tol)(12)(MeOH)(5)(NO3)] . 4MeOH and [(Dy6MIII)-M-III(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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| DOI | 10.1002/ejic.202001082, Early Access Date = {DEC 2020 |
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