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Slow magnetic relaxation in a europium(II) complex

Author

Listed:
  • Dylan Errulat

    (University of Ottawa)

  • Katie L. M. Harriman

    (University of Ottawa)

  • Diogo A. Gálico

    (University of Ottawa)

  • Elvin V. Salerno

    (Florida State University)

  • Johan Tol

    (Florida State University)

  • Akseli Mansikkamäki

    (University of Oulu)

  • Mathieu Rouzières

    (Univ. Bordeaux, CNRS)

  • Stephen Hill

    (Florida State University
    Florida State University)

  • Rodolphe Clérac

    (Univ. Bordeaux, CNRS)

  • Muralee Murugesu

    (University of Ottawa)

Abstract

Single-ion anisotropy is vital for the observation of Single-Molecule Magnet (SMM) properties (i.e., a slow dynamics of the magnetization) in lanthanide-based systems. In the case of europium, the occurrence of this phenomenon has been inhibited by the spin and orbital quantum numbers that give way to J = 0 in the trivalent state and the half-filled population of the 4f orbitals in the divalent state. Herein, by optimizing the local crystal field of a quasi-linear bis(silylamido) EuII complex, the [EuII(N{SiMePh2}2)2] SMM is described, providing an example of a europium complex exhibiting slow relaxation of its magnetization. This behavior is dominated by a thermally activated (Orbach-like) mechanism, with an effective energy barrier of approximately 8 K, determined by bulk magnetometry and electron paramagnetic resonance. Ab initio calculations confirm second-order spin-orbit coupling effects lead to non-negligible axial magnetic anisotropy, splitting the ground state multiplet into four Kramers doublets, thereby allowing for the observation of an Orbach-like relaxation at low temperatures.

Suggested Citation

  • Dylan Errulat & Katie L. M. Harriman & Diogo A. Gálico & Elvin V. Salerno & Johan Tol & Akseli Mansikkamäki & Mathieu Rouzières & Stephen Hill & Rodolphe Clérac & Muralee Murugesu, 2024. "Slow magnetic relaxation in a europium(II) complex," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46196-w
    DOI: 10.1038/s41467-024-46196-w
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    References listed on IDEAS

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    1. Michael N. Leuenberger & Daniel Loss, 2001. "Quantum computing in molecular magnets," Nature, Nature, vol. 410(6830), pages 789-793, April.
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