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Direct determination of high-order transverse ligand field parameters via µSQUID-EPR in a Et4N[160GdPc2] SMM

Author

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  • Gheorghe Taran

    (Karlsruhe Institute of Technology)

  • Eufemio Moreno-Pineda

    (Exactas y Tecnología, Universidad de Panamá
    Facultad de Ciencias Naturales, Exactas y Tecnología, Universidad de Panamá)

  • Michael Schulze

    (Karlsruhe Institute of Technology)

  • Edgar Bonet

    (Institut Néel)

  • Mario Ruben

    (Centre Européen de Sciences Quantiques (CESQ) within the Institut de Science et d’Ingénierie Supramoléculaires (ISIS)
    Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Plats 1
    Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1)

  • Wolfgang Wernsdorfer

    (Karlsruhe Institute of Technology
    Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1)

Abstract

The development of quantum technologies requires a thorough understanding of systems possessing quantum effects that can ultimately be manipulated. In the field of molecular magnetism, one of the main challenges is to measure high-order ligand field parameters, which play an essential role in the relaxation properties of SMMs. The development of highly advanced theoretical calculations has allowed the ab-initio determination of such parameters; however, currently, there is a lack of quantitative assessment of how good the ab-initio parameters are. In our quest for technologies that can allow the extraction of such elusive parameters, we develop an experimental technique that combines the EPR spectroscopy and µSQUID magnetometry. We demonstrate the power of the technique by performing EPR-µSQUID measurement of a magnetically diluted single crystal of Et4N[GdPc2], by sweeping the magnetic field and applying a range of multifrequency microwave pulses. As a result, we were able to directly determine the high-order ligand field parameters of the system, enabling us to test theoretical predictions made by state-of-the-art ab-initio methods.

Suggested Citation

  • Gheorghe Taran & Eufemio Moreno-Pineda & Michael Schulze & Edgar Bonet & Mario Ruben & Wolfgang Wernsdorfer, 2023. "Direct determination of high-order transverse ligand field parameters via µSQUID-EPR in a Et4N[160GdPc2] SMM," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-39003-5
    DOI: 10.1038/s41467-023-39003-5
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