Direct Experimental Evidence of Toroidal Symmetry in the Lanthanum-based Molecular Magnet Dy<sub>8</sub>

ORAL

Abstract

(Et4N)4[Dy8O(nd)8(NO3)10(H2O)2]2MeCN (Dy8) [1] is an intramolecular coupled lanthanide molecule with a Christmas star-like shape. Fits by an Ising type exchange Hamiltonian to low-temperature measurements of the angular dependence of the magnetization provide direct evidence of toroidal symmetry of the magnetic moments in this molecular nanomagnet. This experimental spin configuration result is consistent with the single ion easy axes, which are determined by an electrostatic crystal field point charge model. The short length scale for the decay of stray magnetic fields of toroidal qubits qualifies Dy8 as an excellent potential candidate for data storage and/or quantum computation. [1] D. I. Alexandropoulos, et al., Inorg. Chem. 53, 5420 (2014).

*Work supported by ARO W911NF-13-1-1025 (CCNY); the synthesis of the Dy8 cluster was supported by NSERC (Discovery grant to Th.C.S.).

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Presenters

  • Qing Zhang

    • Physics, City College of New York
    • City College of New York of CUNY

Authors

  • Qing Zhang

    • Physics, City College of New York
    • City College of New York of CUNY

  • Shiqi Li

    • Physics, City College of New York
    • City College of New York of CUNY

  • Myriam Sarachik

    • Physics, City College of New York
    • City College of New York of CUNY

  • Michael Baker

    • Stanford University

  • Theocharis Stamatatos

    • Brock University

  • José Baldoví

    • Max Planck Institute for the Structure and Dynamics of the Matter

  • Eugenio Coronado

    • Universidad de Valencia