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How Far can the Anisotropy Deviate from Uniaxiality in a Dy-Based Single-Molecule Magnet? Dinuclear Dy(III) Complex Study

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Abstract

The DyIII ions in the dimer [Dy2(H2tea)2(O2CPh)4]·2H2O (1) (H3tea = triethanolamine) have the 9-coordinate monocapped square-antiprismatic ligand field environment. Compound 1 shows slow relaxation of magnetization which is observable only with applied magnetic fields. This is consistent with the idea that low-symmetry ligand fields allow for the quantum tunneling of magnetization. This is reflected by the fact that there are no observable maxima in the out-of-phase ac susceptibility above 1.8 K. The {g}-tensor of the DyIII ions {g x = 11, g y = 8.2, g z = 1} further underlying the reduced uniaxiality in this system was determined in electron paramagnetic resonance (X- and Q-band) studies of 1 at temperatures down to 4 K.

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Notes

  1. Crystal data for 1: C40H52Dy2N2O16, 1141.83 g mol−1, triclinic, P \(^{\bar{1}}\), a = 10.0767(17), b = 10.7338(18), c = 10.8695(18) Å, α = 74.189(2), β = 75.521(3), γ = 67.417(2) °, Z = 1, V = 1030.4(3) Å3, T = 100(2) K, ρ calc = 1.840 g cm−3, F(000) = 566, μ(Mo-Kα) = 3.674 mm−1; 30,564 data, 5188 unique (R int = 0.0247), 285 parameters, final wR 2 = 0.0451, S = 1.068 (all data), R 1 (5060 data with I > 2σ(I)) = 0.0181, max. Peak/hole in final difference map +0.982/−0.503 e Å−3. CCDC 1497473.

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Acknowledgements

This work was supported by the DFG-funded transregional collaborative research center SFB/TRR 88 “3MET”. This research was further supported in part by the Russian Foundation for Basic Research (project no. 13-02-01157). RG, AS and VV thank Professor Kev Salikhov for useful discussion and Program of Presidium RAS for support. AB and AKP thank the HGF Program STN for support.

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Authors and Affiliations

  1. Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), P.O Box 76021, Karlsruhe, Germany

    Amer Baniodeh & Annie K. Powell

  2. Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131, Karlsruhe, Germany

    Amer Baniodeh, Abhishake Mondal, Christopher E. Anson & Annie K. Powell

  3. Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirsky tr. 10/7, 420029, Kazan, Russian Federation

    Ravil Galeev, Andrei Sukhanov, Rushana Eremina & Violeta Voronkova

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  1. Amer Baniodeh
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Correspondence to Ravil Galeev.

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Baniodeh, A., Mondal, A., Galeev, R. et al. How Far can the Anisotropy Deviate from Uniaxiality in a Dy-Based Single-Molecule Magnet? Dinuclear Dy(III) Complex Study. Appl Magn Reson 48, 101–113 (2017). https://doi.org/10.1007/s00723-016-0852-y

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  • DOI: https://doi.org/10.1007/s00723-016-0852-y

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