Regensburg 2025 – scientific programme
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MA: Fachverband Magnetismus
MA 34: Molecular Magnetism
MA 34.9: Talk
Thursday, March 20, 2025, 11:45–12:00, H18
Probing magnetic exchange interactions in cobalt-based molecular magnets using magneto-Raman spectroscopy — •Komalavalli Thirunavukkuarasu1, David Hunger2, Julia Netz3, Duncan Moseley4, Ziling Xue4, Dmitry Smirnov5, Andreas Koehn3, and Joris van Slagaren2 — 1Department of Physics, Florida A & M University, Tallahassee, FL, USA — 2Institute of Physical Chemistry, University of Stuttgart, Stuttgart, Germany — 3Institute of Theoretical Chemistry, University of Stuttgart, Stuttgart, Germany — 4Department of Chemistry, University of Tennessee, Knoxville, USA — 5National High Magnetic Field Laboratory, Tallahassee, USA
Combining spectroscopy with one or more external parameters such as low temperature, high pressure, and high magnetic fields, allows us to probe interplay between spin, charge, orbital, and lattice degrees of freedom. Spin exchange interactions play an important role in single-molecule magnets and molecular qubits that feature magnetic bistability. However, there have been few detailed studies to experimentally find the energy scale of these interactions such as spin-phonon coupling. Recently, we employed magneto-Raman spectroscopy together with theoretical work on single molecular magnets to reveal the signatures of spin-phonon interactions in these materials. In this talk, the magneto-Raman experimental results from mononuclear cobalt(II) and radical-bridged dinuclear cobalt(II) complexes and the outcome will be discussed.
Keywords: single molecular magnets; molecular qubits; magneto-Raman spectroscopy