Tuning the ferrotoroidic coupling and magnetic hysteresis in double-triangle complexes {Dy3MIIIDy3} via the MIII-linker

Ashtree, J.M., Borilović, I., Vignesh, K.R., Swain, A., Hamilton, S.H., Whyatt, Y.L., Benjamin, S.L. ORCID: 0000-0002-5038-1599, Phonsri, W., Forsyth, C.M., Wernsdorfer, W., Soncini, A., Rajaraman, G., Langley, S.K. and Murray, K., 2020. Tuning the ferrotoroidic coupling and magnetic hysteresis in double-triangle complexes {Dy3MIIIDy3} via the MIII-linker. European Journal of Inorganic Chemistry. ISSN 1434-1948

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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.

Item Type: Journal article
Publication Title: European Journal of Inorganic Chemistry
Creators: Ashtree, J.M., Borilović, 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. and Murray, K.
Publisher: Wiley
Date: 4 December 2020
ISSN: 1434-1948
Identifiers:
NumberType
10.1002/ejic.202001082DOI
1394615Other
Divisions: Schools > School of Science and Technology
Record created by: Jonathan Gallacher
Date Added: 15 Dec 2020 12:40
Last Modified: 14 Jan 2021 11:29
Related URLs:
URI: http://irep.ntu.ac.uk/id/eprint/41867

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